Home / 1,112.73-1,534.30-947.49

Finding the Fourth Proportional to 1,112.73, 1,534.30 and 947.49

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Solution

The fourth proportional to 1,112.73, 1,534.30 and 947.49 is: 1,306.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.73 : 1,534.30 = 947.49 : x
  2. Step 2: Convert to fraction form
    1,112.73/1,534.30 = 947.49/x
  3. Step 3: Cross multiply
    1,112.73x = 1,534.30 × 947.49
  4. Step 4: Simplify right side
    1,112.73x = 1,453,733.91
  5. Step 5: Solve for x
    x = 1,453,733.91/1,112.73
  6. Step 6: Final answer
    x = 1,306.46

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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.