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Finding the Fourth Proportional to 959.55, 1,439.28 and 497.16

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Solution

The fourth proportional to 959.55, 1,439.28 and 497.16 is: 745.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.55 : 1,439.28 = 497.16 : x
  2. Step 2: Convert to fraction form
    959.55/1,439.28 = 497.16/x
  3. Step 3: Cross multiply
    959.55x = 1,439.28 × 497.16
  4. Step 4: Simplify right side
    959.55x = 715,552.44
  5. Step 5: Solve for x
    x = 715,552.44/959.55
  6. Step 6: Final answer
    x = 745.72

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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.