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Finding the Fourth Proportional to 633.15, 874.17 and 485.52

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Solution

The fourth proportional to 633.15, 874.17 and 485.52 is: 670.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.15 : 874.17 = 485.52 : x
  2. Step 2: Convert to fraction form
    633.15/874.17 = 485.52/x
  3. Step 3: Cross multiply
    633.15x = 874.17 × 485.52
  4. Step 4: Simplify right side
    633.15x = 424,427.02
  5. Step 5: Solve for x
    x = 424,427.02/633.15
  6. Step 6: Final answer
    x = 670.34

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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.