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Finding the Fourth Proportional to 709,897.42, 979,672.08 and 387,620.29

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Solution

The fourth proportional to 709,897.42, 979,672.08 and 387,620.29 is: 534,923.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,897.42 : 979,672.08 = 387,620.29 : x
  2. Step 2: Convert to fraction form
    709,897.42/979,672.08 = 387,620.29/x
  3. Step 3: Cross multiply
    709,897.42x = 979,672.08 × 387,620.29
  4. Step 4: Simplify right side
    709,897.42x = 379,740,775,754.50
  5. Step 5: Solve for x
    x = 379,740,775,754.50/709,897.42
  6. Step 6: Final answer
    x = 534,923.45

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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.