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Finding the Fourth Proportional to 889,644.80, 1,334,564.40 and 861,651.20

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Solution

The fourth proportional to 889,644.80, 1,334,564.40 and 861,651.20 is: 1,292,570.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    889,644.80 : 1,334,564.40 = 861,651.20 : x
  2. Step 2: Convert to fraction form
    889,644.80/1,334,564.40 = 861,651.20/x
  3. Step 3: Cross multiply
    889,644.80x = 1,334,564.40 × 861,651.20
  4. Step 4: Simplify right side
    889,644.80x = 1,149,929,016,737.28
  5. Step 5: Solve for x
    x = 1,149,929,016,737.28/889,644.80
  6. Step 6: Final answer
    x = 1,292,570.94

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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.