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Finding the Fourth Proportional to 259,340.40, 389,302.20 and 200,437.20

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Solution

The fourth proportional to 259,340.40, 389,302.20 and 200,437.20 is: 300,881.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,340.40 : 389,302.20 = 200,437.20 : x
  2. Step 2: Convert to fraction form
    259,340.40/389,302.20 = 200,437.20/x
  3. Step 3: Cross multiply
    259,340.40x = 389,302.20 × 200,437.20
  4. Step 4: Simplify right side
    259,340.40x = 78,030,642,921.84
  5. Step 5: Solve for x
    x = 78,030,642,921.84/259,340.40
  6. Step 6: Final answer
    x = 300,881.17

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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.