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Finding the Fourth Proportional to 640,998.32, 961,517.16 and 220,268.24

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Solution

The fourth proportional to 640,998.32, 961,517.16 and 220,268.24 is: 330,409.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,998.32 : 961,517.16 = 220,268.24 : x
  2. Step 2: Convert to fraction form
    640,998.32/961,517.16 = 220,268.24/x
  3. Step 3: Cross multiply
    640,998.32x = 961,517.16 × 220,268.24
  4. Step 4: Simplify right side
    640,998.32x = 211,791,692,563.00
  5. Step 5: Solve for x
    x = 211,791,692,563.00/640,998.32
  6. Step 6: Final answer
    x = 330,409.12

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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.