Home / 640,811.10-961,303.05-220,215.90

Finding the Fourth Proportional to 640,811.10, 961,303.05 and 220,215.90

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Solution

The fourth proportional to 640,811.10, 961,303.05 and 220,215.90 is: 330,353.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,811.10 : 961,303.05 = 220,215.90 : x
  2. Step 2: Convert to fraction form
    640,811.10/961,303.05 = 220,215.90/x
  3. Step 3: Cross multiply
    640,811.10x = 961,303.05 × 220,215.90
  4. Step 4: Simplify right side
    640,811.10x = 211,694,216,328.50
  5. Step 5: Solve for x
    x = 211,694,216,328.50/640,811.10
  6. Step 6: Final answer
    x = 330,353.54

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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.