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Finding the Fourth Proportional to 709,839.71, 979,573.67 and 387,549.80

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Solution

The fourth proportional to 709,839.71, 979,573.67 and 387,549.80 is: 534,815.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,839.71 : 979,573.67 = 387,549.80 : x
  2. Step 2: Convert to fraction form
    709,839.71/979,573.67 = 387,549.80/x
  3. Step 3: Cross multiply
    709,839.71x = 979,573.67 × 387,549.80
  4. Step 4: Simplify right side
    709,839.71x = 379,633,579,893.77
  5. Step 5: Solve for x
    x = 379,633,579,893.77/709,839.71
  6. Step 6: Final answer
    x = 534,815.92

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1.5x scale

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.