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Finding the Fourth Proportional to 388,042.20, 581,362.80 and 162,999.90

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Solution

The fourth proportional to 388,042.20, 581,362.80 and 162,999.90 is: 244,205.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,042.20 : 581,362.80 = 162,999.90 : x
  2. Step 2: Convert to fraction form
    388,042.20/581,362.80 = 162,999.90/x
  3. Step 3: Cross multiply
    388,042.20x = 581,362.80 × 162,999.90
  4. Step 4: Simplify right side
    388,042.20x = 94,762,078,263.72
  5. Step 5: Solve for x
    x = 94,762,078,263.72/388,042.20
  6. Step 6: Final answer
    x = 244,205.60

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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.