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Finding the Fourth Proportional to 862.65, 1,190.61 and 508.62

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Solution

The fourth proportional to 862.65, 1,190.61 and 508.62 is: 701.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    862.65 : 1,190.61 = 508.62 : x
  2. Step 2: Convert to fraction form
    862.65/1,190.61 = 508.62/x
  3. Step 3: Cross multiply
    862.65x = 1,190.61 × 508.62
  4. Step 4: Simplify right side
    862.65x = 605,568.06
  5. Step 5: Solve for x
    x = 605,568.06/862.65
  6. Step 6: Final answer
    x = 701.99

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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.