Home / 861,463.76-1,188,678.12-479,480.72

Finding the Fourth Proportional to 861,463.76, 1,188,678.12 and 479,480.72

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Solution

The fourth proportional to 861,463.76, 1,188,678.12 and 479,480.72 is: 661,604.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,463.76 : 1,188,678.12 = 479,480.72 : x
  2. Step 2: Convert to fraction form
    861,463.76/1,188,678.12 = 479,480.72/x
  3. Step 3: Cross multiply
    861,463.76x = 1,188,678.12 × 479,480.72
  4. Step 4: Simplify right side
    861,463.76x = 569,948,240,825.85
  5. Step 5: Solve for x
    x = 569,948,240,825.85/861,463.76
  6. Step 6: Final answer
    x = 661,604.43

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Half scale
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Double scale
Find fourth proportional to 861,464.76, 1,188,679.50 and 479,481.72
Similar ratio
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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.