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Finding the Fourth Proportional to 874.32, 1,206.60 and 481.35

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Solution

The fourth proportional to 874.32, 1,206.60 and 481.35 is: 664.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.32 : 1,206.60 = 481.35 : x
  2. Step 2: Convert to fraction form
    874.32/1,206.60 = 481.35/x
  3. Step 3: Cross multiply
    874.32x = 1,206.60 × 481.35
  4. Step 4: Simplify right side
    874.32x = 580,796.91
  5. Step 5: Solve for x
    x = 580,796.91/874.32
  6. Step 6: Final answer
    x = 664.28

Related Problems

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Half scale
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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.