Home / 1,516.85-2,275.35-421.19

Finding the Fourth Proportional to 1,516.85, 2,275.35 and 421.19

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Solution

The fourth proportional to 1,516.85, 2,275.35 and 421.19 is: 631.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,516.85 : 2,275.35 = 421.19 : x
  2. Step 2: Convert to fraction form
    1,516.85/2,275.35 = 421.19/x
  3. Step 3: Cross multiply
    1,516.85x = 2,275.35 × 421.19
  4. Step 4: Simplify right side
    1,516.85x = 958,358.78
  5. Step 5: Solve for x
    x = 958,358.78/1,516.85
  6. Step 6: Final answer
    x = 631.81

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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.