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Finding the Fourth Proportional to 521,529.30, 782,877.15 and 403,722.90

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Solution

The fourth proportional to 521,529.30, 782,877.15 and 403,722.90 is: 606,035.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,529.30 : 782,877.15 = 403,722.90 : x
  2. Step 2: Convert to fraction form
    521,529.30/782,877.15 = 403,722.90/x
  3. Step 3: Cross multiply
    521,529.30x = 782,877.15 × 403,722.90
  4. Step 4: Simplify right side
    521,529.30x = 316,065,433,341.74
  5. Step 5: Solve for x
    x = 316,065,433,341.74/521,529.30
  6. Step 6: Final answer
    x = 606,035.81

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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.