Home / 3,509.24-5,264.34-1,287.78

Finding the Fourth Proportional to 3,509.24, 5,264.34 and 1,287.78

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Solution

The fourth proportional to 3,509.24, 5,264.34 and 1,287.78 is: 1,931.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,509.24 : 5,264.34 = 1,287.78 : x
  2. Step 2: Convert to fraction form
    3,509.24/5,264.34 = 1,287.78/x
  3. Step 3: Cross multiply
    3,509.24x = 5,264.34 × 1,287.78
  4. Step 4: Simplify right side
    3,509.24x = 6,779,311.77
  5. Step 5: Solve for x
    x = 6,779,311.77/3,509.24
  6. Step 6: Final answer
    x = 1,931.85

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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.