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Finding the Fourth Proportional to 627,687.74, 866,190.85 and 355,780.67

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Solution

The fourth proportional to 627,687.74, 866,190.85 and 355,780.67 is: 490,966.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,687.74 : 866,190.85 = 355,780.67 : x
  2. Step 2: Convert to fraction form
    627,687.74/866,190.85 = 355,780.67/x
  3. Step 3: Cross multiply
    627,687.74x = 866,190.85 × 355,780.67
  4. Step 4: Simplify right side
    627,687.74x = 308,173,955,740.46
  5. Step 5: Solve for x
    x = 308,173,955,740.46/627,687.74
  6. Step 6: Final answer
    x = 490,966.98

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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.