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Finding the Fourth Proportional to 886.28, 1,328.93 and 424.17

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Solution

The fourth proportional to 886.28, 1,328.93 and 424.17 is: 636.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.28 : 1,328.93 = 424.17 : x
  2. Step 2: Convert to fraction form
    886.28/1,328.93 = 424.17/x
  3. Step 3: Cross multiply
    886.28x = 1,328.93 × 424.17
  4. Step 4: Simplify right side
    886.28x = 563,690.12
  5. Step 5: Solve for x
    x = 563,690.12/886.28
  6. Step 6: Final answer
    x = 636.02

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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.