Home / 1,516.93-2,275.44-421.38

Finding the Fourth Proportional to 1,516.93, 2,275.44 and 421.38

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Solution

The fourth proportional to 1,516.93, 2,275.44 and 421.38 is: 632.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,516.93 : 2,275.44 = 421.38 : x
  2. Step 2: Convert to fraction form
    1,516.93/2,275.44 = 421.38/x
  3. Step 3: Cross multiply
    1,516.93x = 2,275.44 × 421.38
  4. Step 4: Simplify right side
    1,516.93x = 958,824.91
  5. Step 5: Solve for x
    x = 958,824.91/1,516.93
  6. Step 6: Final answer
    x = 632.08

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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.