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Finding the Fourth Proportional to 747.51, 1,120.19 and 357.19

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Solution

The fourth proportional to 747.51, 1,120.19 and 357.19 is: 535.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    747.51 : 1,120.19 = 357.19 : x
  2. Step 2: Convert to fraction form
    747.51/1,120.19 = 357.19/x
  3. Step 3: Cross multiply
    747.51x = 1,120.19 × 357.19
  4. Step 4: Simplify right side
    747.51x = 400,120.67
  5. Step 5: Solve for x
    x = 400,120.67/747.51
  6. Step 6: Final answer
    x = 535.27

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Double scale
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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.