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Finding the Fourth Proportional to 721,332.25, 995,467.82 and 399,036.79

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Solution

The fourth proportional to 721,332.25, 995,467.82 and 399,036.79 is: 550,686.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,332.25 : 995,467.82 = 399,036.79 : x
  2. Step 2: Convert to fraction form
    721,332.25/995,467.82 = 399,036.79/x
  3. Step 3: Cross multiply
    721,332.25x = 995,467.82 × 399,036.79
  4. Step 4: Simplify right side
    721,332.25x = 397,228,281,445.91
  5. Step 5: Solve for x
    x = 397,228,281,445.91/721,332.25
  6. Step 6: Final answer
    x = 550,686.98

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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.