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Finding the Fourth Proportional to 392,758.88, 588,589.07 and 212,455.04

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Solution

The fourth proportional to 392,758.88, 588,589.07 and 212,455.04 is: 318,385.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,758.88 : 588,589.07 = 212,455.04 : x
  2. Step 2: Convert to fraction form
    392,758.88/588,589.07 = 212,455.04/x
  3. Step 3: Cross multiply
    392,758.88x = 588,589.07 × 212,455.04
  4. Step 4: Simplify right side
    392,758.88x = 125,048,710,405.19
  5. Step 5: Solve for x
    x = 125,048,710,405.19/392,758.88
  6. Step 6: Final answer
    x = 318,385.45

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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.