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Finding the Fourth Proportional to 749.28, 1,122.12 and 585.60

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Solution

The fourth proportional to 749.28, 1,122.12 and 585.60 is: 876.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.28 : 1,122.12 = 585.60 : x
  2. Step 2: Convert to fraction form
    749.28/1,122.12 = 585.60/x
  3. Step 3: Cross multiply
    749.28x = 1,122.12 × 585.60
  4. Step 4: Simplify right side
    749.28x = 657,113.47
  5. Step 5: Solve for x
    x = 657,113.47/749.28
  6. Step 6: Final answer
    x = 876.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.