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Finding the Fourth Proportional to 749.51, 1,034.30 and 434.78

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Solution

The fourth proportional to 749.51, 1,034.30 and 434.78 is: 599.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.51 : 1,034.30 = 434.78 : x
  2. Step 2: Convert to fraction form
    749.51/1,034.30 = 434.78/x
  3. Step 3: Cross multiply
    749.51x = 1,034.30 × 434.78
  4. Step 4: Simplify right side
    749.51x = 449,692.95
  5. Step 5: Solve for x
    x = 449,692.95/749.51
  6. Step 6: Final answer
    x = 599.98

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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.