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Finding the Fourth Proportional to 259,745.87, 390,210.05 and 187,920.38

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Solution

The fourth proportional to 259,745.87, 390,210.05 and 187,920.38 is: 282,308.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,745.87 : 390,210.05 = 187,920.38 : x
  2. Step 2: Convert to fraction form
    259,745.87/390,210.05 = 187,920.38/x
  3. Step 3: Cross multiply
    259,745.87x = 390,210.05 × 187,920.38
  4. Step 4: Simplify right side
    259,745.87x = 73,328,422,321.15
  5. Step 5: Solve for x
    x = 73,328,422,321.15/259,745.87
  6. Step 6: Final answer
    x = 282,308.33

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1.5x scale

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.