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Finding the Fourth Proportional to 554.42, 830.91 and 489.17

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Solution

The fourth proportional to 554.42, 830.91 and 489.17 is: 733.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.42 : 830.91 = 489.17 : x
  2. Step 2: Convert to fraction form
    554.42/830.91 = 489.17/x
  3. Step 3: Cross multiply
    554.42x = 830.91 × 489.17
  4. Step 4: Simplify right side
    554.42x = 406,456.24
  5. Step 5: Solve for x
    x = 406,456.24/554.42
  6. Step 6: Final answer
    x = 733.12

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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.