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Finding the Fourth Proportional to 861,230.60, 1,188,480.64 and 539,118.32

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Solution

The fourth proportional to 861,230.60, 1,188,480.64 and 539,118.32 is: 743,972.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,230.60 : 1,188,480.64 = 539,118.32 : x
  2. Step 2: Convert to fraction form
    861,230.60/1,188,480.64 = 539,118.32/x
  3. Step 3: Cross multiply
    861,230.60x = 1,188,480.64 × 539,118.32
  4. Step 4: Simplify right side
    861,230.60x = 640,731,685,989.33
  5. Step 5: Solve for x
    x = 640,731,685,989.33/861,230.60
  6. Step 6: Final answer
    x = 743,972.27

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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.