Home / 345,470.20-517,034.85-212,434.72

Finding the Fourth Proportional to 345,470.20, 517,034.85 and 212,434.72

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Solution

The fourth proportional to 345,470.20, 517,034.85 and 212,434.72 is: 317,932.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,470.20 : 517,034.85 = 212,434.72 : x
  2. Step 2: Convert to fraction form
    345,470.20/517,034.85 = 212,434.72/x
  3. Step 3: Cross multiply
    345,470.20x = 517,034.85 × 212,434.72
  4. Step 4: Simplify right side
    345,470.20x = 109,836,153,589.99
  5. Step 5: Solve for x
    x = 109,836,153,589.99/345,470.20
  6. Step 6: Final answer
    x = 317,932.35

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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.