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Finding the Fourth Proportional to 259,711.80, 389,567.70 and 148,812.60

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Solution

The fourth proportional to 259,711.80, 389,567.70 and 148,812.60 is: 223,218.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,711.80 : 389,567.70 = 148,812.60 : x
  2. Step 2: Convert to fraction form
    259,711.80/389,567.70 = 148,812.60/x
  3. Step 3: Cross multiply
    259,711.80x = 389,567.70 × 148,812.60
  4. Step 4: Simplify right side
    259,711.80x = 57,972,582,313.02
  5. Step 5: Solve for x
    x = 57,972,582,313.02/259,711.80
  6. Step 6: Final answer
    x = 223,218.90

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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.