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Finding the Fourth Proportional to 259,758.90, 389,747.70 and 141,515.10

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Solution

The fourth proportional to 259,758.90, 389,747.70 and 141,515.10 is: 212,332.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,758.90 : 389,747.70 = 141,515.10 : x
  2. Step 2: Convert to fraction form
    259,758.90/389,747.70 = 141,515.10/x
  3. Step 3: Cross multiply
    259,758.90x = 389,747.70 × 141,515.10
  4. Step 4: Simplify right side
    259,758.90x = 55,155,184,740.27
  5. Step 5: Solve for x
    x = 55,155,184,740.27/259,758.90
  6. Step 6: Final answer
    x = 212,332.22

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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.