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Finding the Fourth Proportional to 839,931.30, 1,259,896.95 and 839,931.30

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Solution

The fourth proportional to 839,931.30, 1,259,896.95 and 839,931.30 is: 1,259,896.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,931.30 : 1,259,896.95 = 839,931.30 : x
  2. Step 2: Convert to fraction form
    839,931.30/1,259,896.95 = 839,931.30/x
  3. Step 3: Cross multiply
    839,931.30x = 1,259,896.95 × 839,931.30
  4. Step 4: Simplify right side
    839,931.30x = 1,058,226,883,079.54
  5. Step 5: Solve for x
    x = 1,058,226,883,079.54/839,931.30
  6. Step 6: Final answer
    x = 1,259,896.95

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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.