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Finding the Fourth Proportional to 1,113.52, 1,670.12 and 382.96

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Solution

The fourth proportional to 1,113.52, 1,670.12 and 382.96 is: 574.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,113.52 : 1,670.12 = 382.96 : x
  2. Step 2: Convert to fraction form
    1,113.52/1,670.12 = 382.96/x
  3. Step 3: Cross multiply
    1,113.52x = 1,670.12 × 382.96
  4. Step 4: Simplify right side
    1,113.52x = 639,589.16
  5. Step 5: Solve for x
    x = 639,589.16/1,113.52
  6. Step 6: Final answer
    x = 574.38

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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.