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Finding the Fourth Proportional to 749.03, 1,117.68 and 671.20

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Solution

The fourth proportional to 749.03, 1,117.68 and 671.20 is: 1,001.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.03 : 1,117.68 = 671.20 : x
  2. Step 2: Convert to fraction form
    749.03/1,117.68 = 671.20/x
  3. Step 3: Cross multiply
    749.03x = 1,117.68 × 671.20
  4. Step 4: Simplify right side
    749.03x = 750,181.79
  5. Step 5: Solve for x
    x = 750,181.79/749.03
  6. Step 6: Final answer
    x = 1,001.54

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.