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Finding the Fourth Proportional to 1,615.65, 2,230.74 and 1,284.86

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Solution

The fourth proportional to 1,615.65, 2,230.74 and 1,284.86 is: 1,774.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,615.65 : 2,230.74 = 1,284.86 : x
  2. Step 2: Convert to fraction form
    1,615.65/2,230.74 = 1,284.86/x
  3. Step 3: Cross multiply
    1,615.65x = 2,230.74 × 1,284.86
  4. Step 4: Simplify right side
    1,615.65x = 2,866,194.17
  5. Step 5: Solve for x
    x = 2,866,194.17/1,615.65
  6. Step 6: Final answer
    x = 1,774.02

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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.