Home / 3,128.61-4,689.81-1,742.58

Finding the Fourth Proportional to 3,128.61, 4,689.81 and 1,742.58

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Solution

The fourth proportional to 3,128.61, 4,689.81 and 1,742.58 is: 2,612.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.61 : 4,689.81 = 1,742.58 : x
  2. Step 2: Convert to fraction form
    3,128.61/4,689.81 = 1,742.58/x
  3. Step 3: Cross multiply
    3,128.61x = 4,689.81 × 1,742.58
  4. Step 4: Simplify right side
    3,128.61x = 8,172,369.11
  5. Step 5: Solve for x
    x = 8,172,369.11/3,128.61
  6. Step 6: Final answer
    x = 2,612.14

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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.