Home / 2,687.48-4,031.40-1,125.91

Finding the Fourth Proportional to 2,687.48, 4,031.40 and 1,125.91

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Solution

The fourth proportional to 2,687.48, 4,031.40 and 1,125.91 is: 1,688.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,687.48 : 4,031.40 = 1,125.91 : x
  2. Step 2: Convert to fraction form
    2,687.48/4,031.40 = 1,125.91/x
  3. Step 3: Cross multiply
    2,687.48x = 4,031.40 × 1,125.91
  4. Step 4: Simplify right side
    2,687.48x = 4,538,983.50
  5. Step 5: Solve for x
    x = 4,538,983.50/2,687.48
  6. Step 6: Final answer
    x = 1,688.94

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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.