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Finding the Fourth Proportional to 591.30, 815.94 and 392.04

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Solution

The fourth proportional to 591.30, 815.94 and 392.04 is: 540.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.30 : 815.94 = 392.04 : x
  2. Step 2: Convert to fraction form
    591.30/815.94 = 392.04/x
  3. Step 3: Cross multiply
    591.30x = 815.94 × 392.04
  4. Step 4: Simplify right side
    591.30x = 319,881.12
  5. Step 5: Solve for x
    x = 319,881.12/591.30
  6. Step 6: Final answer
    x = 540.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.