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Finding the Fourth Proportional to 489,329.28, 675,417.60 and 319,589.28

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Solution

The fourth proportional to 489,329.28, 675,417.60 and 319,589.28 is: 441,126.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,329.28 : 675,417.60 = 319,589.28 : x
  2. Step 2: Convert to fraction form
    489,329.28/675,417.60 = 319,589.28/x
  3. Step 3: Cross multiply
    489,329.28x = 675,417.60 × 319,589.28
  4. Step 4: Simplify right side
    489,329.28x = 215,856,224,483.33
  5. Step 5: Solve for x
    x = 215,856,224,483.33/489,329.28
  6. Step 6: Final answer
    x = 441,126.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.