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Finding the Fourth Proportional to 259,318.80, 388,978.20 and 243,572.40

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Solution

The fourth proportional to 259,318.80, 388,978.20 and 243,572.40 is: 365,358.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,318.80 : 388,978.20 = 243,572.40 : x
  2. Step 2: Convert to fraction form
    259,318.80/388,978.20 = 243,572.40/x
  3. Step 3: Cross multiply
    259,318.80x = 388,978.20 × 243,572.40
  4. Step 4: Simplify right side
    259,318.80x = 94,744,353,721.68
  5. Step 5: Solve for x
    x = 94,744,353,721.68/259,318.80
  6. Step 6: Final answer
    x = 365,358.60

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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.