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Finding the Fourth Proportional to 554.13, 831.03 and 261.47

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Solution

The fourth proportional to 554.13, 831.03 and 261.47 is: 392.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.13 : 831.03 = 261.47 : x
  2. Step 2: Convert to fraction form
    554.13/831.03 = 261.47/x
  3. Step 3: Cross multiply
    554.13x = 831.03 × 261.47
  4. Step 4: Simplify right side
    554.13x = 217,290.38
  5. Step 5: Solve for x
    x = 217,290.38/554.13
  6. Step 6: Final answer
    x = 392.13

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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.