Home / 1,044.38-1,566.80-428.15

Finding the Fourth Proportional to 1,044.38, 1,566.80 and 428.15

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Solution

The fourth proportional to 1,044.38, 1,566.80 and 428.15 is: 642.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,044.38 : 1,566.80 = 428.15 : x
  2. Step 2: Convert to fraction form
    1,044.38/1,566.80 = 428.15/x
  3. Step 3: Cross multiply
    1,044.38x = 1,566.80 × 428.15
  4. Step 4: Simplify right side
    1,044.38x = 670,825.42
  5. Step 5: Solve for x
    x = 670,825.42/1,044.38
  6. Step 6: Final answer
    x = 642.32

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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.