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Finding the Fourth Proportional to 647.73, 971.80 and 493.83

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Solution

The fourth proportional to 647.73, 971.80 and 493.83 is: 740.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.73 : 971.80 = 493.83 : x
  2. Step 2: Convert to fraction form
    647.73/971.80 = 493.83/x
  3. Step 3: Cross multiply
    647.73x = 971.80 × 493.83
  4. Step 4: Simplify right side
    647.73x = 479,902.76
  5. Step 5: Solve for x
    x = 479,902.76/647.73
  6. Step 6: Final answer
    x = 740.90

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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.