Home / 3,128.10-4,312.86-2,288.12

Finding the Fourth Proportional to 3,128.10, 4,312.86 and 2,288.12

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Solution

The fourth proportional to 3,128.10, 4,312.86 and 2,288.12 is: 3,154.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.10 : 4,312.86 = 2,288.12 : x
  2. Step 2: Convert to fraction form
    3,128.10/4,312.86 = 2,288.12/x
  3. Step 3: Cross multiply
    3,128.10x = 4,312.86 × 2,288.12
  4. Step 4: Simplify right side
    3,128.10x = 9,868,341.22
  5. Step 5: Solve for x
    x = 9,868,341.22/3,128.10
  6. Step 6: Final answer
    x = 3,154.74

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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.