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Finding the Fourth Proportional to 486.48, 674.18 and 477.25

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Solution

The fourth proportional to 486.48, 674.18 and 477.25 is: 661.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.48 : 674.18 = 477.25 : x
  2. Step 2: Convert to fraction form
    486.48/674.18 = 477.25/x
  3. Step 3: Cross multiply
    486.48x = 674.18 × 477.25
  4. Step 4: Simplify right side
    486.48x = 321,752.41
  5. Step 5: Solve for x
    x = 321,752.41/486.48
  6. Step 6: Final answer
    x = 661.39

Related Problems

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Double scale
Find fourth proportional to 487.48, 675.57 and 478.25
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.