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Finding the Fourth Proportional to 640,924.60, 961,473.30 and 220,329.40

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Solution

The fourth proportional to 640,924.60, 961,473.30 and 220,329.40 is: 330,523.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,924.60 : 961,473.30 = 220,329.40 : x
  2. Step 2: Convert to fraction form
    640,924.60/961,473.30 = 220,329.40/x
  3. Step 3: Cross multiply
    640,924.60x = 961,473.30 × 220,329.40
  4. Step 4: Simplify right side
    640,924.60x = 211,840,835,305.02
  5. Step 5: Solve for x
    x = 211,840,835,305.02/640,924.60
  6. Step 6: Final answer
    x = 330,523.80

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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.