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Finding the Fourth Proportional to 509,081.40, 763,622.10 and 403,327.80

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Solution

The fourth proportional to 509,081.40, 763,622.10 and 403,327.80 is: 604,991.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,081.40 : 763,622.10 = 403,327.80 : x
  2. Step 2: Convert to fraction form
    509,081.40/763,622.10 = 403,327.80/x
  3. Step 3: Cross multiply
    509,081.40x = 763,622.10 × 403,327.80
  4. Step 4: Simplify right side
    509,081.40x = 307,990,021,624.38
  5. Step 5: Solve for x
    x = 307,990,021,624.38/509,081.40
  6. Step 6: Final answer
    x = 604,991.70

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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.