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Finding the Fourth Proportional to 388,458.40, 582,663.60 and 163,722.40

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Solution

The fourth proportional to 388,458.40, 582,663.60 and 163,722.40 is: 245,573.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,458.40 : 582,663.60 = 163,722.40 : x
  2. Step 2: Convert to fraction form
    388,458.40/582,663.60 = 163,722.40/x
  3. Step 3: Cross multiply
    388,458.40x = 582,663.60 × 163,722.40
  4. Step 4: Simplify right side
    388,458.40x = 95,395,082,984.64
  5. Step 5: Solve for x
    x = 95,395,082,984.64/388,458.40
  6. Step 6: Final answer
    x = 245,573.48

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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.