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Finding the Fourth Proportional to 665.01, 992.49 and 647.73

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Solution

The fourth proportional to 665.01, 992.49 and 647.73 is: 966.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.01 : 992.49 = 647.73 : x
  2. Step 2: Convert to fraction form
    665.01/992.49 = 647.73/x
  3. Step 3: Cross multiply
    665.01x = 992.49 × 647.73
  4. Step 4: Simplify right side
    665.01x = 642,865.55
  5. Step 5: Solve for x
    x = 642,865.55/665.01
  6. Step 6: Final answer
    x = 966.70

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.