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Finding the Fourth Proportional to 485,493.38, 670,017.35 and 281,542.53

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Solution

The fourth proportional to 485,493.38, 670,017.35 and 281,542.53 is: 388,549.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,493.38 : 670,017.35 = 281,542.53 : x
  2. Step 2: Convert to fraction form
    485,493.38/670,017.35 = 281,542.53/x
  3. Step 3: Cross multiply
    485,493.38x = 670,017.35 × 281,542.53
  4. Step 4: Simplify right side
    485,493.38x = 188,638,375,105.10
  5. Step 5: Solve for x
    x = 188,638,375,105.10/485,493.38
  6. Step 6: Final answer
    x = 388,549.84

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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.