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Finding the Fourth Proportional to 646.62, 971.10 and 620.52

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Solution

The fourth proportional to 646.62, 971.10 and 620.52 is: 931.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.62 : 971.10 = 620.52 : x
  2. Step 2: Convert to fraction form
    646.62/971.10 = 620.52/x
  3. Step 3: Cross multiply
    646.62x = 971.10 × 620.52
  4. Step 4: Simplify right side
    646.62x = 602,586.97
  5. Step 5: Solve for x
    x = 602,586.97/646.62
  6. Step 6: Final answer
    x = 931.90

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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.