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Finding the Fourth Proportional to 388,963.60, 582,523.80 and 239,664.40

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Solution

The fourth proportional to 388,963.60, 582,523.80 and 239,664.40 is: 358,928.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,963.60 : 582,523.80 = 239,664.40 : x
  2. Step 2: Convert to fraction form
    388,963.60/582,523.80 = 239,664.40/x
  3. Step 3: Cross multiply
    388,963.60x = 582,523.80 × 239,664.40
  4. Step 4: Simplify right side
    388,963.60x = 139,610,217,012.72
  5. Step 5: Solve for x
    x = 139,610,217,012.72/388,963.60
  6. Step 6: Final answer
    x = 358,928.75

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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.