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Finding the Fourth Proportional to 1,154.76, 1,728.90 and 1,038.12

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Solution

The fourth proportional to 1,154.76, 1,728.90 and 1,038.12 is: 1,554.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,154.76 : 1,728.90 = 1,038.12 : x
  2. Step 2: Convert to fraction form
    1,154.76/1,728.90 = 1,038.12/x
  3. Step 3: Cross multiply
    1,154.76x = 1,728.90 × 1,038.12
  4. Step 4: Simplify right side
    1,154.76x = 1,794,805.67
  5. Step 5: Solve for x
    x = 1,794,805.67/1,154.76
  6. Step 6: Final answer
    x = 1,554.27

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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.