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Finding the Fourth Proportional to 2,890.60, 4,335.80 and 810.60

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Solution

The fourth proportional to 2,890.60, 4,335.80 and 810.60 is: 1,215.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.60 : 4,335.80 = 810.60 : x
  2. Step 2: Convert to fraction form
    2,890.60/4,335.80 = 810.60/x
  3. Step 3: Cross multiply
    2,890.60x = 4,335.80 × 810.60
  4. Step 4: Simplify right side
    2,890.60x = 3,514,599.48
  5. Step 5: Solve for x
    x = 3,514,599.48/2,890.60
  6. Step 6: Final answer
    x = 1,215.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.