Home / 1,988.46-2,737.80-1,689.06

Finding the Fourth Proportional to 1,988.46, 2,737.80 and 1,689.06

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Solution

The fourth proportional to 1,988.46, 2,737.80 and 1,689.06 is: 2,325.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.46 : 2,737.80 = 1,689.06 : x
  2. Step 2: Convert to fraction form
    1,988.46/2,737.80 = 1,689.06/x
  3. Step 3: Cross multiply
    1,988.46x = 2,737.80 × 1,689.06
  4. Step 4: Simplify right side
    1,988.46x = 4,624,308.47
  5. Step 5: Solve for x
    x = 4,624,308.47/1,988.46
  6. Step 6: Final answer
    x = 2,325.57

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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.