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Finding the Fourth Proportional to 663,700.50, 915,906.69 and 361,895.22

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Solution

The fourth proportional to 663,700.50, 915,906.69 and 361,895.22 is: 499,415.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,700.50 : 915,906.69 = 361,895.22 : x
  2. Step 2: Convert to fraction form
    663,700.50/915,906.69 = 361,895.22/x
  3. Step 3: Cross multiply
    663,700.50x = 915,906.69 × 361,895.22
  4. Step 4: Simplify right side
    663,700.50x = 331,462,253,077.02
  5. Step 5: Solve for x
    x = 331,462,253,077.02/663,700.50
  6. Step 6: Final answer
    x = 499,415.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.