Home / 2,287.11-3,156.20-1,239.17

Finding the Fourth Proportional to 2,287.11, 3,156.20 and 1,239.17

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Solution

The fourth proportional to 2,287.11, 3,156.20 and 1,239.17 is: 1,710.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,287.11 : 3,156.20 = 1,239.17 : x
  2. Step 2: Convert to fraction form
    2,287.11/3,156.20 = 1,239.17/x
  3. Step 3: Cross multiply
    2,287.11x = 3,156.20 × 1,239.17
  4. Step 4: Simplify right side
    2,287.11x = 3,911,068.78
  5. Step 5: Solve for x
    x = 3,911,068.78/2,287.11
  6. Step 6: Final answer
    x = 1,710.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.