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Finding the Fourth Proportional to 671.95, 927.60 and 448.25

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Solution

The fourth proportional to 671.95, 927.60 and 448.25 is: 618.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.95 : 927.60 = 448.25 : x
  2. Step 2: Convert to fraction form
    671.95/927.60 = 448.25/x
  3. Step 3: Cross multiply
    671.95x = 927.60 × 448.25
  4. Step 4: Simplify right side
    671.95x = 415,801.40
  5. Step 5: Solve for x
    x = 415,801.40/671.95
  6. Step 6: Final answer
    x = 618.80

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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.