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Finding the Fourth Proportional to 749.94, 1,034.97 and 418.40

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Solution

The fourth proportional to 749.94, 1,034.97 and 418.40 is: 577.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.94 : 1,034.97 = 418.40 : x
  2. Step 2: Convert to fraction form
    749.94/1,034.97 = 418.40/x
  3. Step 3: Cross multiply
    749.94x = 1,034.97 × 418.40
  4. Step 4: Simplify right side
    749.94x = 433,026.27
  5. Step 5: Solve for x
    x = 433,026.27/749.94
  6. Step 6: Final answer
    x = 577.41

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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.