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Finding the Fourth Proportional to 259,628.60, 389,545.30 and 101,830.20

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Solution

The fourth proportional to 259,628.60, 389,545.30 and 101,830.20 is: 152,785.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,628.60 : 389,545.30 = 101,830.20 : x
  2. Step 2: Convert to fraction form
    259,628.60/389,545.30 = 101,830.20/x
  3. Step 3: Cross multiply
    259,628.60x = 389,545.30 × 101,830.20
  4. Step 4: Simplify right side
    259,628.60x = 39,667,475,808.06
  5. Step 5: Solve for x
    x = 39,667,475,808.06/259,628.60
  6. Step 6: Final answer
    x = 152,785.46

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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.