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Finding the Fourth Proportional to 520,046.70, 780,070.05 and 436,065.90

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Solution

The fourth proportional to 520,046.70, 780,070.05 and 436,065.90 is: 654,098.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,046.70 : 780,070.05 = 436,065.90 : x
  2. Step 2: Convert to fraction form
    520,046.70/780,070.05 = 436,065.90/x
  3. Step 3: Cross multiply
    520,046.70x = 780,070.05 × 436,065.90
  4. Step 4: Simplify right side
    520,046.70x = 340,161,948,416.30
  5. Step 5: Solve for x
    x = 340,161,948,416.30/520,046.70
  6. Step 6: Final answer
    x = 654,098.85

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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.