Home / 513,219,140.40-769,828,710.60-308,641,911.60

Finding the Fourth Proportional to 513,219,140.40, 769,828,710.60 and 308,641,911.60

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Solution

The fourth proportional to 513,219,140.40, 769,828,710.60 and 308,641,911.60 is: 462,962,867.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,219,140.40 : 769,828,710.60 = 308,641,911.60 : x
  2. Step 2: Convert to fraction form
    513,219,140.40/769,828,710.60 = 308,641,911.60/x
  3. Step 3: Cross multiply
    513,219,140.40x = 769,828,710.60 × 308,641,911.60
  4. Step 4: Simplify right side
    513,219,140.40x = 237,601,404,844,147,200
  5. Step 5: Solve for x
    x = 237,601,404,844,147,200/513,219,140.40
  6. Step 6: Final answer
    x = 462,962,867.40

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.