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Finding the Fourth Proportional to 833.41, 1,242.61 and 764.02

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Solution

The fourth proportional to 833.41, 1,242.61 and 764.02 is: 1,139.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.41 : 1,242.61 = 764.02 : x
  2. Step 2: Convert to fraction form
    833.41/1,242.61 = 764.02/x
  3. Step 3: Cross multiply
    833.41x = 1,242.61 × 764.02
  4. Step 4: Simplify right side
    833.41x = 949,378.89
  5. Step 5: Solve for x
    x = 949,378.89/833.41
  6. Step 6: Final answer
    x = 1,139.15

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.