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Finding the Fourth Proportional to 807.03, 1,112.22 and 641.18

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Solution

The fourth proportional to 807.03, 1,112.22 and 641.18 is: 883.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    807.03 : 1,112.22 = 641.18 : x
  2. Step 2: Convert to fraction form
    807.03/1,112.22 = 641.18/x
  3. Step 3: Cross multiply
    807.03x = 1,112.22 × 641.18
  4. Step 4: Simplify right side
    807.03x = 713,133.22
  5. Step 5: Solve for x
    x = 713,133.22/807.03
  6. Step 6: Final answer
    x = 883.65

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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.