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Finding the Fourth Proportional to 551.62, 760.53 and 489.52

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Solution

The fourth proportional to 551.62, 760.53 and 489.52 is: 674.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.62 : 760.53 = 489.52 : x
  2. Step 2: Convert to fraction form
    551.62/760.53 = 489.52/x
  3. Step 3: Cross multiply
    551.62x = 760.53 × 489.52
  4. Step 4: Simplify right side
    551.62x = 372,294.65
  5. Step 5: Solve for x
    x = 372,294.65/551.62
  6. Step 6: Final answer
    x = 674.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.