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Finding the Fourth Proportional to 671.28, 927.36 and 505.50

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Solution

The fourth proportional to 671.28, 927.36 and 505.50 is: 698.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.28 : 927.36 = 505.50 : x
  2. Step 2: Convert to fraction form
    671.28/927.36 = 505.50/x
  3. Step 3: Cross multiply
    671.28x = 927.36 × 505.50
  4. Step 4: Simplify right side
    671.28x = 468,780.48
  5. Step 5: Solve for x
    x = 468,780.48/671.28
  6. Step 6: Final answer
    x = 698.34

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1.5x scale

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.