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Finding the Fourth Proportional to 509,039.40, 763,559.10 and 403,285.80

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Solution

The fourth proportional to 509,039.40, 763,559.10 and 403,285.80 is: 604,928.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,039.40 : 763,559.10 = 403,285.80 : x
  2. Step 2: Convert to fraction form
    509,039.40/763,559.10 = 403,285.80/x
  3. Step 3: Cross multiply
    509,039.40x = 763,559.10 × 403,285.80
  4. Step 4: Simplify right side
    509,039.40x = 307,932,542,490.78
  5. Step 5: Solve for x
    x = 307,932,542,490.78/509,039.40
  6. Step 6: Final answer
    x = 604,928.70

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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.