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Finding the Fourth Proportional to 839,807.10, 1,259,710.65 and 766,323.90

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Solution

The fourth proportional to 839,807.10, 1,259,710.65 and 766,323.90 is: 1,149,485.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,807.10 : 1,259,710.65 = 766,323.90 : x
  2. Step 2: Convert to fraction form
    839,807.10/1,259,710.65 = 766,323.90/x
  3. Step 3: Cross multiply
    839,807.10x = 1,259,710.65 × 766,323.90
  4. Step 4: Simplify right side
    839,807.10x = 965,346,378,179.54
  5. Step 5: Solve for x
    x = 965,346,378,179.54/839,807.10
  6. Step 6: Final answer
    x = 1,149,485.85

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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.