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Finding the Fourth Proportional to 748.58, 1,034.18 and 499.81

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Solution

The fourth proportional to 748.58, 1,034.18 and 499.81 is: 690.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.58 : 1,034.18 = 499.81 : x
  2. Step 2: Convert to fraction form
    748.58/1,034.18 = 499.81/x
  3. Step 3: Cross multiply
    748.58x = 1,034.18 × 499.81
  4. Step 4: Simplify right side
    748.58x = 516,885.84
  5. Step 5: Solve for x
    x = 516,885.84/748.58
  6. Step 6: Final answer
    x = 690.49

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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.