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Finding the Fourth Proportional to 671.42, 926.54 and 450.34

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Solution

The fourth proportional to 671.42, 926.54 and 450.34 is: 621.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.42 : 926.54 = 450.34 : x
  2. Step 2: Convert to fraction form
    671.42/926.54 = 450.34/x
  3. Step 3: Cross multiply
    671.42x = 926.54 × 450.34
  4. Step 4: Simplify right side
    671.42x = 417,258.02
  5. Step 5: Solve for x
    x = 417,258.02/671.42
  6. Step 6: Final answer
    x = 621.46

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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.