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Finding the Fourth Proportional to 259,745.70, 389,618.55 and 218,411.40

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Solution

The fourth proportional to 259,745.70, 389,618.55 and 218,411.40 is: 327,617.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,745.70 : 389,618.55 = 218,411.40 : x
  2. Step 2: Convert to fraction form
    259,745.70/389,618.55 = 218,411.40/x
  3. Step 3: Cross multiply
    259,745.70x = 389,618.55 × 218,411.40
  4. Step 4: Simplify right side
    259,745.70x = 85,097,132,971.47
  5. Step 5: Solve for x
    x = 85,097,132,971.47/259,745.70
  6. Step 6: Final answer
    x = 327,617.10

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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.