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Finding the Fourth Proportional to 259,368.40, 389,344.20 and 200,465.20

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Solution

The fourth proportional to 259,368.40, 389,344.20 and 200,465.20 is: 300,923.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,368.40 : 389,344.20 = 200,465.20 : x
  2. Step 2: Convert to fraction form
    259,368.40/389,344.20 = 200,465.20/x
  3. Step 3: Cross multiply
    259,368.40x = 389,344.20 × 200,465.20
  4. Step 4: Simplify right side
    259,368.40x = 78,049,962,921.84
  5. Step 5: Solve for x
    x = 78,049,962,921.84/259,368.40
  6. Step 6: Final answer
    x = 300,923.18

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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.