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Finding the Fourth Proportional to 388,606.70, 582,930.86 and 122,387.95

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Solution

The fourth proportional to 388,606.70, 582,930.86 and 122,387.95 is: 183,588.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,606.70 : 582,930.86 = 122,387.95 : x
  2. Step 2: Convert to fraction form
    388,606.70/582,930.86 = 122,387.95/x
  3. Step 3: Cross multiply
    388,606.70x = 582,930.86 × 122,387.95
  4. Step 4: Simplify right side
    388,606.70x = 71,343,712,947.14
  5. Step 5: Solve for x
    x = 71,343,712,947.14/388,606.70
  6. Step 6: Final answer
    x = 183,588.48

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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.