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Finding the Fourth Proportional to 319,347.25, 478,478.61 and 192,721.43

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Solution

The fourth proportional to 319,347.25, 478,478.61 and 192,721.43 is: 288,754.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,347.25 : 478,478.61 = 192,721.43 : x
  2. Step 2: Convert to fraction form
    319,347.25/478,478.61 = 192,721.43/x
  3. Step 3: Cross multiply
    319,347.25x = 478,478.61 × 192,721.43
  4. Step 4: Simplify right side
    319,347.25x = 92,213,083,139.81
  5. Step 5: Solve for x
    x = 92,213,083,139.81/319,347.25
  6. Step 6: Final answer
    x = 288,754.90

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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.