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Finding the Fourth Proportional to 555.08, 831.20 and 538.65

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Solution

The fourth proportional to 555.08, 831.20 and 538.65 is: 806.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.08 : 831.20 = 538.65 : x
  2. Step 2: Convert to fraction form
    555.08/831.20 = 538.65/x
  3. Step 3: Cross multiply
    555.08x = 831.20 × 538.65
  4. Step 4: Simplify right side
    555.08x = 447,725.52
  5. Step 5: Solve for x
    x = 447,725.52/555.08
  6. Step 6: Final answer
    x = 806.60

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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.