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Finding the Fourth Proportional to 575.64, 862.46 and 387.66

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Solution

The fourth proportional to 575.64, 862.46 and 387.66 is: 580.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    575.64 : 862.46 = 387.66 : x
  2. Step 2: Convert to fraction form
    575.64/862.46 = 387.66/x
  3. Step 3: Cross multiply
    575.64x = 862.46 × 387.66
  4. Step 4: Simplify right side
    575.64x = 334,339.31
  5. Step 5: Solve for x
    x = 334,339.31/575.64
  6. Step 6: Final answer
    x = 580.81

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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.