Home / 640,861.20-961,356.96-220,082.40

Finding the Fourth Proportional to 640,861.20, 961,356.96 and 220,082.40

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Solution

The fourth proportional to 640,861.20, 961,356.96 and 220,082.40 is: 330,145.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,861.20 : 961,356.96 = 220,082.40 : x
  2. Step 2: Convert to fraction form
    640,861.20/961,356.96 = 220,082.40/x
  3. Step 3: Cross multiply
    640,861.20x = 961,356.96 × 220,082.40
  4. Step 4: Simplify right side
    640,861.20x = 211,577,747,013.50
  5. Step 5: Solve for x
    x = 211,577,747,013.50/640,861.20
  6. Step 6: Final answer
    x = 330,145.98

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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.