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Finding the Fourth Proportional to 640,796.10, 961,280.55 and 220,200.90

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Solution

The fourth proportional to 640,796.10, 961,280.55 and 220,200.90 is: 330,331.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,796.10 : 961,280.55 = 220,200.90 : x
  2. Step 2: Convert to fraction form
    640,796.10/961,280.55 = 220,200.90/x
  3. Step 3: Cross multiply
    640,796.10x = 961,280.55 × 220,200.90
  4. Step 4: Simplify right side
    640,796.10x = 211,674,842,262.50
  5. Step 5: Solve for x
    x = 211,674,842,262.50/640,796.10
  6. Step 6: Final answer
    x = 330,331.04

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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.