Home / 2,312.16-3,191.28-1,317.60

Finding the Fourth Proportional to 2,312.16, 3,191.28 and 1,317.60

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Solution

The fourth proportional to 2,312.16, 3,191.28 and 1,317.60 is: 1,818.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,312.16 : 3,191.28 = 1,317.60 : x
  2. Step 2: Convert to fraction form
    2,312.16/3,191.28 = 1,317.60/x
  3. Step 3: Cross multiply
    2,312.16x = 3,191.28 × 1,317.60
  4. Step 4: Simplify right side
    2,312.16x = 4,204,830.53
  5. Step 5: Solve for x
    x = 4,204,830.53/2,312.16
  6. Step 6: Final answer
    x = 1,818.57

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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.