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Finding the Fourth Proportional to 491.55, 736.56 and 489.30

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Solution

The fourth proportional to 491.55, 736.56 and 489.30 is: 733.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.55 : 736.56 = 489.30 : x
  2. Step 2: Convert to fraction form
    491.55/736.56 = 489.30/x
  3. Step 3: Cross multiply
    491.55x = 736.56 × 489.30
  4. Step 4: Simplify right side
    491.55x = 360,398.81
  5. Step 5: Solve for x
    x = 360,398.81/491.55
  6. Step 6: Final answer
    x = 733.19

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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.