Home / 1,213.90-1,673.56-1,047.76

Finding the Fourth Proportional to 1,213.90, 1,673.56 and 1,047.76

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Solution

The fourth proportional to 1,213.90, 1,673.56 and 1,047.76 is: 1,444.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.90 : 1,673.56 = 1,047.76 : x
  2. Step 2: Convert to fraction form
    1,213.90/1,673.56 = 1,047.76/x
  3. Step 3: Cross multiply
    1,213.90x = 1,673.56 × 1,047.76
  4. Step 4: Simplify right side
    1,213.90x = 1,753,489.23
  5. Step 5: Solve for x
    x = 1,753,489.23/1,213.90
  6. Step 6: Final answer
    x = 1,444.51

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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.