Home / 3,118.72-4,677.28-926.88

Finding the Fourth Proportional to 3,118.72, 4,677.28 and 926.88

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Solution

The fourth proportional to 3,118.72, 4,677.28 and 926.88 is: 1,390.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,118.72 : 4,677.28 = 926.88 : x
  2. Step 2: Convert to fraction form
    3,118.72/4,677.28 = 926.88/x
  3. Step 3: Cross multiply
    3,118.72x = 4,677.28 × 926.88
  4. Step 4: Simplify right side
    3,118.72x = 4,335,277.29
  5. Step 5: Solve for x
    x = 4,335,277.29/3,118.72
  6. Step 6: Final answer
    x = 1,390.08

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1.5x scale

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.