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Finding the Fourth Proportional to 671.55, 926.69 and 450.47

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Solution

The fourth proportional to 671.55, 926.69 and 450.47 is: 621.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.55 : 926.69 = 450.47 : x
  2. Step 2: Convert to fraction form
    671.55/926.69 = 450.47/x
  3. Step 3: Cross multiply
    671.55x = 926.69 × 450.47
  4. Step 4: Simplify right side
    671.55x = 417,442.54
  5. Step 5: Solve for x
    x = 417,442.54/671.55
  6. Step 6: Final answer
    x = 621.61

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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.