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Finding the Fourth Proportional to 418,697.27, 628,034.18 and 134,385.58

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Solution

The fourth proportional to 418,697.27, 628,034.18 and 134,385.58 is: 201,574.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,697.27 : 628,034.18 = 134,385.58 : x
  2. Step 2: Convert to fraction form
    418,697.27/628,034.18 = 134,385.58/x
  3. Step 3: Cross multiply
    418,697.27x = 628,034.18 × 134,385.58
  4. Step 4: Simplify right side
    418,697.27x = 84,398,734,398.95
  5. Step 5: Solve for x
    x = 84,398,734,398.95/418,697.27
  6. Step 6: Final answer
    x = 201,574.60

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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.