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Finding the Fourth Proportional to 888.76, 1,223.82 and 764.24

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Solution

The fourth proportional to 888.76, 1,223.82 and 764.24 is: 1,052.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.76 : 1,223.82 = 764.24 : x
  2. Step 2: Convert to fraction form
    888.76/1,223.82 = 764.24/x
  3. Step 3: Cross multiply
    888.76x = 1,223.82 × 764.24
  4. Step 4: Simplify right side
    888.76x = 935,292.20
  5. Step 5: Solve for x
    x = 935,292.20/888.76
  6. Step 6: Final answer
    x = 1,052.36

Related Problems

Find fourth proportional to 444.38, 611.91 and 382.12
Half scale
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Double scale
Find fourth proportional to 889.76, 1,225.20 and 765.24
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.