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Finding the Fourth Proportional to 399,353.72, 598,729.52 and 207,021.19

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Solution

The fourth proportional to 399,353.72, 598,729.52 and 207,021.19 is: 310,375.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,353.72 : 598,729.52 = 207,021.19 : x
  2. Step 2: Convert to fraction form
    399,353.72/598,729.52 = 207,021.19/x
  3. Step 3: Cross multiply
    399,353.72x = 598,729.52 × 207,021.19
  4. Step 4: Simplify right side
    399,353.72x = 123,949,699,545.80
  5. Step 5: Solve for x
    x = 123,949,699,545.80/399,353.72
  6. Step 6: Final answer
    x = 310,375.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.