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Finding the Fourth Proportional to 663,613.60, 995,420.40 and 394,175.20

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Solution

The fourth proportional to 663,613.60, 995,420.40 and 394,175.20 is: 591,262.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,613.60 : 995,420.40 = 394,175.20 : x
  2. Step 2: Convert to fraction form
    663,613.60/995,420.40 = 394,175.20/x
  3. Step 3: Cross multiply
    663,613.60x = 995,420.40 × 394,175.20
  4. Step 4: Simplify right side
    663,613.60x = 392,370,035,254.08
  5. Step 5: Solve for x
    x = 392,370,035,254.08/663,613.60
  6. Step 6: Final answer
    x = 591,262.80

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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.