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Finding the Fourth Proportional to 666,301.60, 999,682.80 and 643,261.60

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Solution

The fourth proportional to 666,301.60, 999,682.80 and 643,261.60 is: 965,114.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,301.60 : 999,682.80 = 643,261.60 : x
  2. Step 2: Convert to fraction form
    666,301.60/999,682.80 = 643,261.60/x
  3. Step 3: Cross multiply
    666,301.60x = 999,682.80 × 643,261.60
  4. Step 4: Simplify right side
    666,301.60x = 643,057,557,420.48
  5. Step 5: Solve for x
    x = 643,057,557,420.48/666,301.60
  6. Step 6: Final answer
    x = 965,114.83

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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.