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Finding the Fourth Proportional to 839,762.80, 1,259,644.20 and 766,279.60

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Solution

The fourth proportional to 839,762.80, 1,259,644.20 and 766,279.60 is: 1,149,419.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,762.80 : 1,259,644.20 = 766,279.60 : x
  2. Step 2: Convert to fraction form
    839,762.80/1,259,644.20 = 766,279.60/x
  3. Step 3: Cross multiply
    839,762.80x = 1,259,644.20 × 766,279.60
  4. Step 4: Simplify right side
    839,762.80x = 965,239,653,718.32
  5. Step 5: Solve for x
    x = 965,239,653,718.32/839,762.80
  6. Step 6: Final answer
    x = 1,149,419.40

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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.