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Finding the Fourth Proportional to 749.81, 1,034.58 and 455.02

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Solution

The fourth proportional to 749.81, 1,034.58 and 455.02 is: 627.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.81 : 1,034.58 = 455.02 : x
  2. Step 2: Convert to fraction form
    749.81/1,034.58 = 455.02/x
  3. Step 3: Cross multiply
    749.81x = 1,034.58 × 455.02
  4. Step 4: Simplify right side
    749.81x = 470,753.71
  5. Step 5: Solve for x
    x = 470,753.71/749.81
  6. Step 6: Final answer
    x = 627.83

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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.