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Finding the Fourth Proportional to 368,489.10, 551,421.45 and 255,639.90

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Solution

The fourth proportional to 368,489.10, 551,421.45 and 255,639.90 is: 382,549.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,489.10 : 551,421.45 = 255,639.90 : x
  2. Step 2: Convert to fraction form
    368,489.10/551,421.45 = 255,639.90/x
  3. Step 3: Cross multiply
    368,489.10x = 551,421.45 × 255,639.90
  4. Step 4: Simplify right side
    368,489.10x = 140,965,324,335.86
  5. Step 5: Solve for x
    x = 140,965,324,335.86/368,489.10
  6. Step 6: Final answer
    x = 382,549.51

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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.