Home / 1,717.12-2,570.88-1,139.20

Finding the Fourth Proportional to 1,717.12, 2,570.88 and 1,139.20

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Solution

The fourth proportional to 1,717.12, 2,570.88 and 1,139.20 is: 1,705.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,717.12 : 2,570.88 = 1,139.20 : x
  2. Step 2: Convert to fraction form
    1,717.12/2,570.88 = 1,139.20/x
  3. Step 3: Cross multiply
    1,717.12x = 2,570.88 × 1,139.20
  4. Step 4: Simplify right side
    1,717.12x = 2,928,746.50
  5. Step 5: Solve for x
    x = 2,928,746.50/1,717.12
  6. Step 6: Final answer
    x = 1,705.62

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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.