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Finding the Fourth Proportional to 709,539.90, 979,168.53 and 387,257.50

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Solution

The fourth proportional to 709,539.90, 979,168.53 and 387,257.50 is: 534,417.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,539.90 : 979,168.53 = 387,257.50 : x
  2. Step 2: Convert to fraction form
    709,539.90/979,168.53 = 387,257.50/x
  3. Step 3: Cross multiply
    709,539.90x = 979,168.53 × 387,257.50
  4. Step 4: Simplify right side
    709,539.90x = 379,190,357,006.48
  5. Step 5: Solve for x
    x = 379,190,357,006.48/709,539.90
  6. Step 6: Final answer
    x = 534,417.24

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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.