Home / 3,288.72-4,931.40-1,339.92

Finding the Fourth Proportional to 3,288.72, 4,931.40 and 1,339.92

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Solution

The fourth proportional to 3,288.72, 4,931.40 and 1,339.92 is: 2,009.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,288.72 : 4,931.40 = 1,339.92 : x
  2. Step 2: Convert to fraction form
    3,288.72/4,931.40 = 1,339.92/x
  3. Step 3: Cross multiply
    3,288.72x = 4,931.40 × 1,339.92
  4. Step 4: Simplify right side
    3,288.72x = 6,607,681.49
  5. Step 5: Solve for x
    x = 6,607,681.49/3,288.72
  6. Step 6: Final answer
    x = 2,009.20

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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.