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Finding the Fourth Proportional to 513,006.60, 769,509.90 and 139,029.60

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Solution

The fourth proportional to 513,006.60, 769,509.90 and 139,029.60 is: 208,544.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,006.60 : 769,509.90 = 139,029.60 : x
  2. Step 2: Convert to fraction form
    513,006.60/769,509.90 = 139,029.60/x
  3. Step 3: Cross multiply
    513,006.60x = 769,509.90 × 139,029.60
  4. Step 4: Simplify right side
    513,006.60x = 106,984,653,593.04
  5. Step 5: Solve for x
    x = 106,984,653,593.04/513,006.60
  6. Step 6: Final answer
    x = 208,544.40

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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.