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Finding the Fourth Proportional to 388,398.78, 582,555.78 and 104,117.22

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Solution

The fourth proportional to 388,398.78, 582,555.78 and 104,117.22 is: 156,164.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,398.78 : 582,555.78 = 104,117.22 : x
  2. Step 2: Convert to fraction form
    388,398.78/582,555.78 = 104,117.22/x
  3. Step 3: Cross multiply
    388,398.78x = 582,555.78 × 104,117.22
  4. Step 4: Simplify right side
    388,398.78x = 60,654,088,308.53
  5. Step 5: Solve for x
    x = 60,654,088,308.53/388,398.78
  6. Step 6: Final answer
    x = 156,164.47

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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.