Home / 2,319.30-3,478.23-931.91

Finding the Fourth Proportional to 2,319.30, 3,478.23 and 931.91

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Solution

The fourth proportional to 2,319.30, 3,478.23 and 931.91 is: 1,397.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,319.30 : 3,478.23 = 931.91 : x
  2. Step 2: Convert to fraction form
    2,319.30/3,478.23 = 931.91/x
  3. Step 3: Cross multiply
    2,319.30x = 3,478.23 × 931.91
  4. Step 4: Simplify right side
    2,319.30x = 3,241,379.93
  5. Step 5: Solve for x
    x = 3,241,379.93/2,319.30
  6. Step 6: Final answer
    x = 1,397.57

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1.5x scale

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.