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Finding the Fourth Proportional to 485.96, 671.02 and 450.78

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Solution

The fourth proportional to 485.96, 671.02 and 450.78 is: 622.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.96 : 671.02 = 450.78 : x
  2. Step 2: Convert to fraction form
    485.96/671.02 = 450.78/x
  3. Step 3: Cross multiply
    485.96x = 671.02 × 450.78
  4. Step 4: Simplify right side
    485.96x = 302,482.40
  5. Step 5: Solve for x
    x = 302,482.40/485.96
  6. Step 6: Final answer
    x = 622.44

Related Problems

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Double scale
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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.