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Finding the Fourth Proportional to 489.11, 732.47 and 342.99

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Solution

The fourth proportional to 489.11, 732.47 and 342.99 is: 513.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.11 : 732.47 = 342.99 : x
  2. Step 2: Convert to fraction form
    489.11/732.47 = 342.99/x
  3. Step 3: Cross multiply
    489.11x = 732.47 × 342.99
  4. Step 4: Simplify right side
    489.11x = 251,228.17
  5. Step 5: Solve for x
    x = 251,228.17/489.11
  6. Step 6: Final answer
    x = 513.65

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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.