Home / 2,687.03-4,030.80-931.76

Finding the Fourth Proportional to 2,687.03, 4,030.80 and 931.76

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Solution

The fourth proportional to 2,687.03, 4,030.80 and 931.76 is: 1,397.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,687.03 : 4,030.80 = 931.76 : x
  2. Step 2: Convert to fraction form
    2,687.03/4,030.80 = 931.76/x
  3. Step 3: Cross multiply
    2,687.03x = 4,030.80 × 931.76
  4. Step 4: Simplify right side
    2,687.03x = 3,755,734.71
  5. Step 5: Solve for x
    x = 3,755,734.71/2,687.03
  6. Step 6: Final answer
    x = 1,397.73

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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.