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Finding the Fourth Proportional to 400,712.80, 601,069.20 and 190,760.80

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Solution

The fourth proportional to 400,712.80, 601,069.20 and 190,760.80 is: 286,141.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,712.80 : 601,069.20 = 190,760.80 : x
  2. Step 2: Convert to fraction form
    400,712.80/601,069.20 = 190,760.80/x
  3. Step 3: Cross multiply
    400,712.80x = 601,069.20 × 190,760.80
  4. Step 4: Simplify right side
    400,712.80x = 114,660,441,447.36
  5. Step 5: Solve for x
    x = 114,660,441,447.36/400,712.80
  6. Step 6: Final answer
    x = 286,141.20

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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.