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Finding the Fourth Proportional to 555.12, 831.47 and 544.05

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Solution

The fourth proportional to 555.12, 831.47 and 544.05 is: 814.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.12 : 831.47 = 544.05 : x
  2. Step 2: Convert to fraction form
    555.12/831.47 = 544.05/x
  3. Step 3: Cross multiply
    555.12x = 831.47 × 544.05
  4. Step 4: Simplify right side
    555.12x = 452,358.53
  5. Step 5: Solve for x
    x = 452,358.53/555.12
  6. Step 6: Final answer
    x = 814.88

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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.