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Finding the Fourth Proportional to 643,695.20, 966,579.60 and 486,101.60

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Solution

The fourth proportional to 643,695.20, 966,579.60 and 486,101.60 is: 729,935.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,695.20 : 966,579.60 = 486,101.60 : x
  2. Step 2: Convert to fraction form
    643,695.20/966,579.60 = 486,101.60/x
  3. Step 3: Cross multiply
    643,695.20x = 966,579.60 × 486,101.60
  4. Step 4: Simplify right side
    643,695.20x = 469,855,890,087.36
  5. Step 5: Solve for x
    x = 469,855,890,087.36/643,695.20
  6. Step 6: Final answer
    x = 729,935.36

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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.