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Finding the Fourth Proportional to 638,976, 881,786.88 and 356,352

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Solution

The fourth proportional to 638,976, 881,786.88 and 356,352 is: 491,765.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,976 : 881,786.88 = 356,352 : x
  2. Step 2: Convert to fraction form
    638,976/881,786.88 = 356,352/x
  3. Step 3: Cross multiply
    638,976x = 881,786.88 × 356,352
  4. Step 4: Simplify right side
    638,976x = 314,226,518,261.76
  5. Step 5: Solve for x
    x = 314,226,518,261.76/638,976
  6. Step 6: Final answer
    x = 491,765.76

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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.