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Finding the Fourth Proportional to 500,387.58, 690,521.49 and 285,523.74

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Solution

The fourth proportional to 500,387.58, 690,521.49 and 285,523.74 is: 394,015.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,387.58 : 690,521.49 = 285,523.74 : x
  2. Step 2: Convert to fraction form
    500,387.58/690,521.49 = 285,523.74/x
  3. Step 3: Cross multiply
    500,387.58x = 690,521.49 × 285,523.74
  4. Step 4: Simplify right side
    500,387.58x = 197,160,278,375.17
  5. Step 5: Solve for x
    x = 197,160,278,375.17/500,387.58
  6. Step 6: Final answer
    x = 394,015.13

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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.