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Finding the Fourth Proportional to 715,464.60, 987,125.72 and 428,880.12

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Solution

The fourth proportional to 715,464.60, 987,125.72 and 428,880.12 is: 591,725.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,464.60 : 987,125.72 = 428,880.12 : x
  2. Step 2: Convert to fraction form
    715,464.60/987,125.72 = 428,880.12/x
  3. Step 3: Cross multiply
    715,464.60x = 987,125.72 × 428,880.12
  4. Step 4: Simplify right side
    715,464.60x = 423,358,595,104.29
  5. Step 5: Solve for x
    x = 423,358,595,104.29/715,464.60
  6. Step 6: Final answer
    x = 591,725.43

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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.