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Finding the Fourth Proportional to 418,410.60, 627,615.90 and 258,613.80

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Solution

The fourth proportional to 418,410.60, 627,615.90 and 258,613.80 is: 387,920.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,410.60 : 627,615.90 = 258,613.80 : x
  2. Step 2: Convert to fraction form
    418,410.60/627,615.90 = 258,613.80/x
  3. Step 3: Cross multiply
    418,410.60x = 627,615.90 × 258,613.80
  4. Step 4: Simplify right side
    418,410.60x = 162,310,132,839.42
  5. Step 5: Solve for x
    x = 162,310,132,839.42/418,410.60
  6. Step 6: Final answer
    x = 387,920.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.