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Finding the Fourth Proportional to 388,606.32, 582,930.30 and 122,387.58

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Solution

The fourth proportional to 388,606.32, 582,930.30 and 122,387.58 is: 183,587.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,606.32 : 582,930.30 = 122,387.58 : x
  2. Step 2: Convert to fraction form
    388,606.32/582,930.30 = 122,387.58/x
  3. Step 3: Cross multiply
    388,606.32x = 582,930.30 × 122,387.58
  4. Step 4: Simplify right side
    388,606.32x = 71,343,428,725.67
  5. Step 5: Solve for x
    x = 71,343,428,725.67/388,606.32
  6. Step 6: Final answer
    x = 183,587.93

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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.