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Finding the Fourth Proportional to 709,359.46, 978,939.64 and 387,087.24

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Solution

The fourth proportional to 709,359.46, 978,939.64 and 387,087.24 is: 534,193.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,359.46 : 978,939.64 = 387,087.24 : x
  2. Step 2: Convert to fraction form
    709,359.46/978,939.64 = 387,087.24/x
  3. Step 3: Cross multiply
    709,359.46x = 978,939.64 × 387,087.24
  4. Step 4: Simplify right side
    709,359.46x = 378,935,043,374.19
  5. Step 5: Solve for x
    x = 378,935,043,374.19/709,359.46
  6. Step 6: Final answer
    x = 534,193.26

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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.