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Finding the Fourth Proportional to 1,130.76, 1,560.41 and 633.44

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Solution

The fourth proportional to 1,130.76, 1,560.41 and 633.44 is: 874.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,130.76 : 1,560.41 = 633.44 : x
  2. Step 2: Convert to fraction form
    1,130.76/1,560.41 = 633.44/x
  3. Step 3: Cross multiply
    1,130.76x = 1,560.41 × 633.44
  4. Step 4: Simplify right side
    1,130.76x = 988,415.14
  5. Step 5: Solve for x
    x = 988,415.14/1,130.76
  6. Step 6: Final answer
    x = 874.12

Related Problems

Find fourth proportional to 565.38, 780.20 and 316.72
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.