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Finding the Fourth Proportional to 3,509.52, 5,263.87 and 912.66

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Solution

The fourth proportional to 3,509.52, 5,263.87 and 912.66 is: 1,368.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,509.52 : 5,263.87 = 912.66 : x
  2. Step 2: Convert to fraction form
    3,509.52/5,263.87 = 912.66/x
  3. Step 3: Cross multiply
    3,509.52x = 5,263.87 × 912.66
  4. Step 4: Simplify right side
    3,509.52x = 4,804,123.59
  5. Step 5: Solve for x
    x = 4,804,123.59/3,509.52
  6. Step 6: Final answer
    x = 1,368.88

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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.