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Finding the Fourth Proportional to 808.76, 1,116.21 and 477.22

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Solution

The fourth proportional to 808.76, 1,116.21 and 477.22 is: 658.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.76 : 1,116.21 = 477.22 : x
  2. Step 2: Convert to fraction form
    808.76/1,116.21 = 477.22/x
  3. Step 3: Cross multiply
    808.76x = 1,116.21 × 477.22
  4. Step 4: Simplify right side
    808.76x = 532,674.95
  5. Step 5: Solve for x
    x = 532,674.95/808.76
  6. Step 6: Final answer
    x = 658.63

Related Problems

Find fourth proportional to 404.38, 558.11 and 238.61
Half scale
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Double scale
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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.