Home / 1,112.02-1,534.55-640.07

Finding the Fourth Proportional to 1,112.02, 1,534.55 and 640.07

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Solution

The fourth proportional to 1,112.02, 1,534.55 and 640.07 is: 883.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.02 : 1,534.55 = 640.07 : x
  2. Step 2: Convert to fraction form
    1,112.02/1,534.55 = 640.07/x
  3. Step 3: Cross multiply
    1,112.02x = 1,534.55 × 640.07
  4. Step 4: Simplify right side
    1,112.02x = 982,222.22
  5. Step 5: Solve for x
    x = 982,222.22/1,112.02
  6. Step 6: Final answer
    x = 883.27

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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.