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Finding the Fourth Proportional to 643,237.20, 965,892.60 and 485,643.60

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Solution

The fourth proportional to 643,237.20, 965,892.60 and 485,643.60 is: 729,248.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,237.20 : 965,892.60 = 485,643.60 : x
  2. Step 2: Convert to fraction form
    643,237.20/965,892.60 = 485,643.60/x
  3. Step 3: Cross multiply
    643,237.20x = 965,892.60 × 485,643.60
  4. Step 4: Simplify right side
    643,237.20x = 469,079,559,477.36
  5. Step 5: Solve for x
    x = 469,079,559,477.36/643,237.20
  6. Step 6: Final answer
    x = 729,248.18

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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.