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Finding the Fourth Proportional to 2,841.60, 3,916.80 and 2,316.80

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Solution

The fourth proportional to 2,841.60, 3,916.80 and 2,316.80 is: 3,193.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,841.60 : 3,916.80 = 2,316.80 : x
  2. Step 2: Convert to fraction form
    2,841.60/3,916.80 = 2,316.80/x
  3. Step 3: Cross multiply
    2,841.60x = 3,916.80 × 2,316.80
  4. Step 4: Simplify right side
    2,841.60x = 9,074,442.24
  5. Step 5: Solve for x
    x = 9,074,442.24/2,841.60
  6. Step 6: Final answer
    x = 3,193.43

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1.5x scale

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.