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Finding the Fourth Proportional to 1,154.03, 1,731.04 and 642.11

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Solution

The fourth proportional to 1,154.03, 1,731.04 and 642.11 is: 963.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,154.03 : 1,731.04 = 642.11 : x
  2. Step 2: Convert to fraction form
    1,154.03/1,731.04 = 642.11/x
  3. Step 3: Cross multiply
    1,154.03x = 1,731.04 × 642.11
  4. Step 4: Simplify right side
    1,154.03x = 1,111,509.44
  5. Step 5: Solve for x
    x = 1,111,509.44/1,154.03
  6. Step 6: Final answer
    x = 963.16

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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.