Home / 1,112.23-1,534.85-640.00

Finding the Fourth Proportional to 1,112.23, 1,534.85 and 640.00

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Solution

The fourth proportional to 1,112.23, 1,534.85 and 640.00 is: 883.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.23 : 1,534.85 = 640.00 : x
  2. Step 2: Convert to fraction form
    1,112.23/1,534.85 = 640.00/x
  3. Step 3: Cross multiply
    1,112.23x = 1,534.85 × 640.00
  4. Step 4: Simplify right side
    1,112.23x = 982,305.12
  5. Step 5: Solve for x
    x = 982,305.12/1,112.23
  6. Step 6: Final answer
    x = 883.18

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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.