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Finding the Fourth Proportional to 721,615.32, 995,814.24 and 399,325.20

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Solution

The fourth proportional to 721,615.32, 995,814.24 and 399,325.20 is: 551,060.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,615.32 : 995,814.24 = 399,325.20 : x
  2. Step 2: Convert to fraction form
    721,615.32/995,814.24 = 399,325.20/x
  3. Step 3: Cross multiply
    721,615.32x = 995,814.24 × 399,325.20
  4. Step 4: Simplify right side
    721,615.32x = 397,653,720,550.85
  5. Step 5: Solve for x
    x = 397,653,720,550.85/721,615.32
  6. Step 6: Final answer
    x = 551,060.53

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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.