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Finding the Fourth Proportional to 259,562.40, 389,343.60 and 215,822.40

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Solution

The fourth proportional to 259,562.40, 389,343.60 and 215,822.40 is: 323,733.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,562.40 : 389,343.60 = 215,822.40 : x
  2. Step 2: Convert to fraction form
    259,562.40/389,343.60 = 215,822.40/x
  3. Step 3: Cross multiply
    259,562.40x = 389,343.60 × 215,822.40
  4. Step 4: Simplify right side
    259,562.40x = 84,029,070,176.64
  5. Step 5: Solve for x
    x = 84,029,070,176.64/259,562.40
  6. Step 6: Final answer
    x = 323,733.60

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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.