Home / 861,514.01-1,292,271.32-387,645.78

Finding the Fourth Proportional to 861,514.01, 1,292,271.32 and 387,645.78

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Solution

The fourth proportional to 861,514.01, 1,292,271.32 and 387,645.78 is: 581,468.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,514.01 : 1,292,271.32 = 387,645.78 : x
  2. Step 2: Convert to fraction form
    861,514.01/1,292,271.32 = 387,645.78/x
  3. Step 3: Cross multiply
    861,514.01x = 1,292,271.32 × 387,645.78
  4. Step 4: Simplify right side
    861,514.01x = 500,943,523,813.03
  5. Step 5: Solve for x
    x = 500,943,523,813.03/861,514.01
  6. Step 6: Final answer
    x = 581,468.81

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Double scale
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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.