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Finding the Fourth Proportional to 1,228.76, 1,695.84 and 704.76

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Solution

The fourth proportional to 1,228.76, 1,695.84 and 704.76 is: 972.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,228.76 : 1,695.84 = 704.76 : x
  2. Step 2: Convert to fraction form
    1,228.76/1,695.84 = 704.76/x
  3. Step 3: Cross multiply
    1,228.76x = 1,695.84 × 704.76
  4. Step 4: Simplify right side
    1,228.76x = 1,195,160.20
  5. Step 5: Solve for x
    x = 1,195,160.20/1,228.76
  6. Step 6: Final answer
    x = 972.66

Related Problems

Find fourth proportional to 614.38, 847.92 and 352.38
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.