Home / 861,105.12-1,188,489.54-570,203.61

Finding the Fourth Proportional to 861,105.12, 1,188,489.54 and 570,203.61

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Solution

The fourth proportional to 861,105.12, 1,188,489.54 and 570,203.61 is: 786,989.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,105.12 : 1,188,489.54 = 570,203.61 : x
  2. Step 2: Convert to fraction form
    861,105.12/1,188,489.54 = 570,203.61/x
  3. Step 3: Cross multiply
    861,105.12x = 1,188,489.54 × 570,203.61
  4. Step 4: Simplify right side
    861,105.12x = 677,681,026,155.24
  5. Step 5: Solve for x
    x = 677,681,026,155.24/861,105.12
  6. Step 6: Final answer
    x = 786,989.89

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Double scale
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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.