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Finding the Fourth Proportional to 1,281,737.80, 1,768,828.42 and 708,789.16

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Solution

The fourth proportional to 1,281,737.80, 1,768,828.42 and 708,789.16 is: 978,145.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281,737.80 : 1,768,828.42 = 708,789.16 : x
  2. Step 2: Convert to fraction form
    1,281,737.80/1,768,828.42 = 708,789.16/x
  3. Step 3: Cross multiply
    1,281,737.80x = 1,768,828.42 × 708,789.16
  4. Step 4: Simplify right side
    1,281,737.80x = 1,253,726,409,995.93
  5. Step 5: Solve for x
    x = 1,253,726,409,995.93/1,281,737.80
  6. Step 6: Final answer
    x = 978,145.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.