Home / 640,823.60-961,235.40-309,047.60

Finding the Fourth Proportional to 640,823.60, 961,235.40 and 309,047.60

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Solution

The fourth proportional to 640,823.60, 961,235.40 and 309,047.60 is: 463,571.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,823.60 : 961,235.40 = 309,047.60 : x
  2. Step 2: Convert to fraction form
    640,823.60/961,235.40 = 309,047.60/x
  3. Step 3: Cross multiply
    640,823.60x = 961,235.40 × 309,047.60
  4. Step 4: Simplify right side
    640,823.60x = 297,067,493,405.04
  5. Step 5: Solve for x
    x = 297,067,493,405.04/640,823.60
  6. Step 6: Final answer
    x = 463,571.40

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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.