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Finding the Fourth Proportional to 715,411.60, 987,052.68 and 428,827.12

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Solution

The fourth proportional to 715,411.60, 987,052.68 and 428,827.12 is: 591,652.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,411.60 : 987,052.68 = 428,827.12 : x
  2. Step 2: Convert to fraction form
    715,411.60/987,052.68 = 428,827.12/x
  3. Step 3: Cross multiply
    715,411.60x = 987,052.68 × 428,827.12
  4. Step 4: Simplify right side
    715,411.60x = 423,274,958,052.68
  5. Step 5: Solve for x
    x = 423,274,958,052.68/715,411.60
  6. Step 6: Final answer
    x = 591,652.36

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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.