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Finding the Fourth Proportional to 709,871.52, 979,570.80 and 387,588

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Solution

The fourth proportional to 709,871.52, 979,570.80 and 387,588 is: 534,843.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,871.52 : 979,570.80 = 387,588 : x
  2. Step 2: Convert to fraction form
    709,871.52/979,570.80 = 387,588/x
  3. Step 3: Cross multiply
    709,871.52x = 979,570.80 × 387,588
  4. Step 4: Simplify right side
    709,871.52x = 379,669,887,230.40
  5. Step 5: Solve for x
    x = 379,669,887,230.40/709,871.52
  6. Step 6: Final answer
    x = 534,843.10

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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.