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Finding the Fourth Proportional to 1,114.97, 1,672.45 and 384.55

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Solution

The fourth proportional to 1,114.97, 1,672.45 and 384.55 is: 576.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,114.97 : 1,672.45 = 384.55 : x
  2. Step 2: Convert to fraction form
    1,114.97/1,672.45 = 384.55/x
  3. Step 3: Cross multiply
    1,114.97x = 1,672.45 × 384.55
  4. Step 4: Simplify right side
    1,114.97x = 643,135.51
  5. Step 5: Solve for x
    x = 643,135.51/1,114.97
  6. Step 6: Final answer
    x = 576.82

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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.