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Finding the Fourth Proportional to 1,155.03, 1,732.59 and 424.20

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Solution

The fourth proportional to 1,155.03, 1,732.59 and 424.20 is: 636.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,155.03 : 1,732.59 = 424.20 : x
  2. Step 2: Convert to fraction form
    1,155.03/1,732.59 = 424.20/x
  3. Step 3: Cross multiply
    1,155.03x = 1,732.59 × 424.20
  4. Step 4: Simplify right side
    1,155.03x = 734,971.18
  5. Step 5: Solve for x
    x = 734,971.18/1,155.03
  6. Step 6: Final answer
    x = 636.32

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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.