Home / 2,312.86-3,191.76-1,368.64

Finding the Fourth Proportional to 2,312.86, 3,191.76 and 1,368.64

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Solution

The fourth proportional to 2,312.86, 3,191.76 and 1,368.64 is: 1,888.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,312.86 : 3,191.76 = 1,368.64 : x
  2. Step 2: Convert to fraction form
    2,312.86/3,191.76 = 1,368.64/x
  3. Step 3: Cross multiply
    2,312.86x = 3,191.76 × 1,368.64
  4. Step 4: Simplify right side
    2,312.86x = 4,368,370.41
  5. Step 5: Solve for x
    x = 4,368,370.41/2,312.86
  6. Step 6: Final answer
    x = 1,888.73

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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.