Home / 285,453.12-428,326.26-145,211.28

Finding the Fourth Proportional to 285,453.12, 428,326.26 and 145,211.28

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Solution

The fourth proportional to 285,453.12, 428,326.26 and 145,211.28 is: 217,891.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,453.12 : 428,326.26 = 145,211.28 : x
  2. Step 2: Convert to fraction form
    285,453.12/428,326.26 = 145,211.28/x
  3. Step 3: Cross multiply
    285,453.12x = 428,326.26 × 145,211.28
  4. Step 4: Simplify right side
    285,453.12x = 62,197,804,472.21
  5. Step 5: Solve for x
    x = 62,197,804,472.21/285,453.12
  6. Step 6: Final answer
    x = 217,891.49

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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.