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Finding the Fourth Proportional to 839,807.10, 1,259,710.65 and 740,079.90

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Solution

The fourth proportional to 839,807.10, 1,259,710.65 and 740,079.90 is: 1,110,119.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,807.10 : 1,259,710.65 = 740,079.90 : x
  2. Step 2: Convert to fraction form
    839,807.10/1,259,710.65 = 740,079.90/x
  3. Step 3: Cross multiply
    839,807.10x = 1,259,710.65 × 740,079.90
  4. Step 4: Simplify right side
    839,807.10x = 932,286,531,880.94
  5. Step 5: Solve for x
    x = 932,286,531,880.94/839,807.10
  6. Step 6: Final answer
    x = 1,110,119.85

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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.