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Finding the Fourth Proportional to 709,352.64, 978,887.43 and 387,062.82

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Solution

The fourth proportional to 709,352.64, 978,887.43 and 387,062.82 is: 534,136.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,352.64 : 978,887.43 = 387,062.82 : x
  2. Step 2: Convert to fraction form
    709,352.64/978,887.43 = 387,062.82/x
  3. Step 3: Cross multiply
    709,352.64x = 978,887.43 × 387,062.82
  4. Step 4: Simplify right side
    709,352.64x = 378,890,929,118.35
  5. Step 5: Solve for x
    x = 378,890,929,118.35/709,352.64
  6. Step 6: Final answer
    x = 534,136.21

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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.