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Finding the Fourth Proportional to 867.93, 1,199.13 and 607.11

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Solution

The fourth proportional to 867.93, 1,199.13 and 607.11 is: 838.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.93 : 1,199.13 = 607.11 : x
  2. Step 2: Convert to fraction form
    867.93/1,199.13 = 607.11/x
  3. Step 3: Cross multiply
    867.93x = 1,199.13 × 607.11
  4. Step 4: Simplify right side
    867.93x = 728,003.81
  5. Step 5: Solve for x
    x = 728,003.81/867.93
  6. Step 6: Final answer
    x = 838.78

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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.