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Finding the Fourth Proportional to 2,689.64, 3,708.50 and 2,315.98

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Solution

The fourth proportional to 2,689.64, 3,708.50 and 2,315.98 is: 3,193.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689.64 : 3,708.50 = 2,315.98 : x
  2. Step 2: Convert to fraction form
    2,689.64/3,708.50 = 2,315.98/x
  3. Step 3: Cross multiply
    2,689.64x = 3,708.50 × 2,315.98
  4. Step 4: Simplify right side
    2,689.64x = 8,588,811.83
  5. Step 5: Solve for x
    x = 8,588,811.83/2,689.64
  6. Step 6: Final answer
    x = 3,193.29

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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.