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Finding the Fourth Proportional to 557.88, 831.92 and 545.48

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Solution

The fourth proportional to 557.88, 831.92 and 545.48 is: 813.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.88 : 831.92 = 545.48 : x
  2. Step 2: Convert to fraction form
    557.88/831.92 = 545.48/x
  3. Step 3: Cross multiply
    557.88x = 831.92 × 545.48
  4. Step 4: Simplify right side
    557.88x = 453,795.72
  5. Step 5: Solve for x
    x = 453,795.72/557.88
  6. Step 6: Final answer
    x = 813.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.