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Finding the Fourth Proportional to 1,358.97, 2,038.45 and 493.28

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Solution

The fourth proportional to 1,358.97, 2,038.45 and 493.28 is: 739.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,358.97 : 2,038.45 = 493.28 : x
  2. Step 2: Convert to fraction form
    1,358.97/2,038.45 = 493.28/x
  3. Step 3: Cross multiply
    1,358.97x = 2,038.45 × 493.28
  4. Step 4: Simplify right side
    1,358.97x = 1,005,526.62
  5. Step 5: Solve for x
    x = 1,005,526.62/1,358.97
  6. Step 6: Final answer
    x = 739.92

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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.