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Finding the Fourth Proportional to 1,966.16, 2,712.20 and 1,651.76

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Solution

The fourth proportional to 1,966.16, 2,712.20 and 1,651.76 is: 2,278.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,966.16 : 2,712.20 = 1,651.76 : x
  2. Step 2: Convert to fraction form
    1,966.16/2,712.20 = 1,651.76/x
  3. Step 3: Cross multiply
    1,966.16x = 2,712.20 × 1,651.76
  4. Step 4: Simplify right side
    1,966.16x = 4,479,903.47
  5. Step 5: Solve for x
    x = 4,479,903.47/1,966.16
  6. Step 6: Final answer
    x = 2,278.50

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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.