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Finding the Fourth Proportional to 749.97, 1,034.72 and 455.13

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Solution

The fourth proportional to 749.97, 1,034.72 and 455.13 is: 627.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.97 : 1,034.72 = 455.13 : x
  2. Step 2: Convert to fraction form
    749.97/1,034.72 = 455.13/x
  3. Step 3: Cross multiply
    749.97x = 1,034.72 × 455.13
  4. Step 4: Simplify right side
    749.97x = 470,929.84
  5. Step 5: Solve for x
    x = 470,929.84/749.97
  6. Step 6: Final answer
    x = 627.93

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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.