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Finding the Fourth Proportional to 3,116.64, 4,300.64 and 1,719.20

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Solution

The fourth proportional to 3,116.64, 4,300.64 and 1,719.20 is: 2,372.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,116.64 : 4,300.64 = 1,719.20 : x
  2. Step 2: Convert to fraction form
    3,116.64/4,300.64 = 1,719.20/x
  3. Step 3: Cross multiply
    3,116.64x = 4,300.64 × 1,719.20
  4. Step 4: Simplify right side
    3,116.64x = 7,393,660.29
  5. Step 5: Solve for x
    x = 7,393,660.29/3,116.64
  6. Step 6: Final answer
    x = 2,372.32

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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.