Home / 1,116.19-1,540.20-637.63

Finding the Fourth Proportional to 1,116.19, 1,540.20 and 637.63

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Solution

The fourth proportional to 1,116.19, 1,540.20 and 637.63 is: 879.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.19 : 1,540.20 = 637.63 : x
  2. Step 2: Convert to fraction form
    1,116.19/1,540.20 = 637.63/x
  3. Step 3: Cross multiply
    1,116.19x = 1,540.20 × 637.63
  4. Step 4: Simplify right side
    1,116.19x = 982,081.34
  5. Step 5: Solve for x
    x = 982,081.34/1,116.19
  6. Step 6: Final answer
    x = 879.85

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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.