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Finding the Fourth Proportional to 647.48, 891.32 and 481.16

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Solution

The fourth proportional to 647.48, 891.32 and 481.16 is: 662.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.48 : 891.32 = 481.16 : x
  2. Step 2: Convert to fraction form
    647.48/891.32 = 481.16/x
  3. Step 3: Cross multiply
    647.48x = 891.32 × 481.16
  4. Step 4: Simplify right side
    647.48x = 428,867.53
  5. Step 5: Solve for x
    x = 428,867.53/647.48
  6. Step 6: Final answer
    x = 662.36

Related Problems

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Half scale
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Double scale
Find fourth proportional to 648.48, 892.70 and 482.16
Similar ratio
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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.