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Finding the Fourth Proportional to 749.84, 1,125.33 and 520.34

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Solution

The fourth proportional to 749.84, 1,125.33 and 520.34 is: 780.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.84 : 1,125.33 = 520.34 : x
  2. Step 2: Convert to fraction form
    749.84/1,125.33 = 520.34/x
  3. Step 3: Cross multiply
    749.84x = 1,125.33 × 520.34
  4. Step 4: Simplify right side
    749.84x = 585,548.59
  5. Step 5: Solve for x
    x = 585,548.59/749.84
  6. Step 6: Final answer
    x = 780.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.