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Finding the Fourth Proportional to 632,690.22, 872,785.52 and 428,671.34

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Solution

The fourth proportional to 632,690.22, 872,785.52 and 428,671.34 is: 591,344.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    632,690.22 : 872,785.52 = 428,671.34 : x
  2. Step 2: Convert to fraction form
    632,690.22/872,785.52 = 428,671.34/x
  3. Step 3: Cross multiply
    632,690.22x = 872,785.52 × 428,671.34
  4. Step 4: Simplify right side
    632,690.22x = 374,138,138,391.00
  5. Step 5: Solve for x
    x = 374,138,138,391.00/632,690.22
  6. Step 6: Final answer
    x = 591,344.91

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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.