Home / 2,312.32-3,191.60-1,318.16

Finding the Fourth Proportional to 2,312.32, 3,191.60 and 1,318.16

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Solution

The fourth proportional to 2,312.32, 3,191.60 and 1,318.16 is: 1,819.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,312.32 : 3,191.60 = 1,318.16 : x
  2. Step 2: Convert to fraction form
    2,312.32/3,191.60 = 1,318.16/x
  3. Step 3: Cross multiply
    2,312.32x = 3,191.60 × 1,318.16
  4. Step 4: Simplify right side
    2,312.32x = 4,207,039.46
  5. Step 5: Solve for x
    x = 4,207,039.46/2,312.32
  6. Step 6: Final answer
    x = 1,819.40

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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.