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Finding the Fourth Proportional to 2,711.95, 4,068.55 and 980.58

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Solution

The fourth proportional to 2,711.95, 4,068.55 and 980.58 is: 1,471.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,711.95 : 4,068.55 = 980.58 : x
  2. Step 2: Convert to fraction form
    2,711.95/4,068.55 = 980.58/x
  3. Step 3: Cross multiply
    2,711.95x = 4,068.55 × 980.58
  4. Step 4: Simplify right side
    2,711.95x = 3,989,526.84
  5. Step 5: Solve for x
    x = 3,989,526.84/2,711.95
  6. Step 6: Final answer
    x = 1,471.09

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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.