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Finding the Fourth Proportional to 1,144.76, 1,579.78 and 672.56

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Solution

The fourth proportional to 1,144.76, 1,579.78 and 672.56 is: 928.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,144.76 : 1,579.78 = 672.56 : x
  2. Step 2: Convert to fraction form
    1,144.76/1,579.78 = 672.56/x
  3. Step 3: Cross multiply
    1,144.76x = 1,579.78 × 672.56
  4. Step 4: Simplify right side
    1,144.76x = 1,062,496.84
  5. Step 5: Solve for x
    x = 1,062,496.84/1,144.76
  6. Step 6: Final answer
    x = 928.14

Related Problems

Find fourth proportional to 572.38, 789.89 and 336.28
Half scale
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Double scale
Find fourth proportional to 1,145.76, 1,581.16 and 673.56
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.