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Finding the Fourth Proportional to 205,066.40, 307,340.40 and 99,658.40

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Solution

The fourth proportional to 205,066.40, 307,340.40 and 99,658.40 is: 149,361.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,066.40 : 307,340.40 = 99,658.40 : x
  2. Step 2: Convert to fraction form
    205,066.40/307,340.40 = 99,658.40/x
  3. Step 3: Cross multiply
    205,066.40x = 307,340.40 × 99,658.40
  4. Step 4: Simplify right side
    205,066.40x = 30,629,052,519.36
  5. Step 5: Solve for x
    x = 30,629,052,519.36/205,066.40
  6. Step 6: Final answer
    x = 149,361.63

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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.