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Finding the Fourth Proportional to 626,439, 864,486.44 and 339,959.15

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Solution

The fourth proportional to 626,439, 864,486.44 and 339,959.15 is: 469,143.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,439 : 864,486.44 = 339,959.15 : x
  2. Step 2: Convert to fraction form
    626,439/864,486.44 = 339,959.15/x
  3. Step 3: Cross multiply
    626,439x = 864,486.44 × 339,959.15
  4. Step 4: Simplify right side
    626,439x = 293,890,069,306.70
  5. Step 5: Solve for x
    x = 293,890,069,306.70/626,439
  6. Step 6: Final answer
    x = 469,143.95

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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.