Home / 1,263.48-1,742.66-1,121.86

Finding the Fourth Proportional to 1,263.48, 1,742.66 and 1,121.86

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Solution

The fourth proportional to 1,263.48, 1,742.66 and 1,121.86 is: 1,547.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,263.48 : 1,742.66 = 1,121.86 : x
  2. Step 2: Convert to fraction form
    1,263.48/1,742.66 = 1,121.86/x
  3. Step 3: Cross multiply
    1,263.48x = 1,742.66 × 1,121.86
  4. Step 4: Simplify right side
    1,263.48x = 1,955,020.55
  5. Step 5: Solve for x
    x = 1,955,020.55/1,263.48
  6. Step 6: Final answer
    x = 1,547.33

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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.