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Finding the Fourth Proportional to 627.40, 866.16 and 469.98

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Solution

The fourth proportional to 627.40, 866.16 and 469.98 is: 648.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.40 : 866.16 = 469.98 : x
  2. Step 2: Convert to fraction form
    627.40/866.16 = 469.98/x
  3. Step 3: Cross multiply
    627.40x = 866.16 × 469.98
  4. Step 4: Simplify right side
    627.40x = 407,077.88
  5. Step 5: Solve for x
    x = 407,077.88/627.40
  6. Step 6: Final answer
    x = 648.83

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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.