Home / 1,403.16-2,101.80-1,127.76

Finding the Fourth Proportional to 1,403.16, 2,101.80 and 1,127.76

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Solution

The fourth proportional to 1,403.16, 2,101.80 and 1,127.76 is: 1,689.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403.16 : 2,101.80 = 1,127.76 : x
  2. Step 2: Convert to fraction form
    1,403.16/2,101.80 = 1,127.76/x
  3. Step 3: Cross multiply
    1,403.16x = 2,101.80 × 1,127.76
  4. Step 4: Simplify right side
    1,403.16x = 2,370,325.97
  5. Step 5: Solve for x
    x = 2,370,325.97/1,403.16
  6. Step 6: Final answer
    x = 1,689.28

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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.