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Finding the Fourth Proportional to 419,468.61, 626,033.85 and 391,026.63

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Solution

The fourth proportional to 419,468.61, 626,033.85 and 391,026.63 is: 583,585.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,468.61 : 626,033.85 = 391,026.63 : x
  2. Step 2: Convert to fraction form
    419,468.61/626,033.85 = 391,026.63/x
  3. Step 3: Cross multiply
    419,468.61x = 626,033.85 × 391,026.63
  4. Step 4: Simplify right side
    419,468.61x = 244,795,906,631.43
  5. Step 5: Solve for x
    x = 244,795,906,631.43/419,468.61
  6. Step 6: Final answer
    x = 583,585.76

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.