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Finding the Fourth Proportional to 489,629.87, 675,516 and 319,962.41

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Solution

The fourth proportional to 489,629.87, 675,516 and 319,962.41 is: 441,434.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,629.87 : 675,516 = 319,962.41 : x
  2. Step 2: Convert to fraction form
    489,629.87/675,516 = 319,962.41/x
  3. Step 3: Cross multiply
    489,629.87x = 675,516 × 319,962.41
  4. Step 4: Simplify right side
    489,629.87x = 216,139,727,353.56
  5. Step 5: Solve for x
    x = 216,139,727,353.56/489,629.87
  6. Step 6: Final answer
    x = 441,434.93

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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.