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Finding the Fourth Proportional to 625,128.66, 862,676.70 and 338,649.90

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Solution

The fourth proportional to 625,128.66, 862,676.70 and 338,649.90 is: 467,336.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,128.66 : 862,676.70 = 338,649.90 : x
  2. Step 2: Convert to fraction form
    625,128.66/862,676.70 = 338,649.90/x
  3. Step 3: Cross multiply
    625,128.66x = 862,676.70 × 338,649.90
  4. Step 4: Simplify right side
    625,128.66x = 292,145,378,187.33
  5. Step 5: Solve for x
    x = 292,145,378,187.33/625,128.66
  6. Step 6: Final answer
    x = 467,336.40

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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.