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Finding the Fourth Proportional to 971.98, 1,458.54 and 424.18

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Solution

The fourth proportional to 971.98, 1,458.54 and 424.18 is: 636.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    971.98 : 1,458.54 = 424.18 : x
  2. Step 2: Convert to fraction form
    971.98/1,458.54 = 424.18/x
  3. Step 3: Cross multiply
    971.98x = 1,458.54 × 424.18
  4. Step 4: Simplify right side
    971.98x = 618,683.50
  5. Step 5: Solve for x
    x = 618,683.50/971.98
  6. Step 6: Final answer
    x = 636.52

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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.