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Finding the Fourth Proportional to 978,557.84, 1,350,455.28 and 611,252.54

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Solution

The fourth proportional to 978,557.84, 1,350,455.28 and 611,252.54 is: 843,556.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,557.84 : 1,350,455.28 = 611,252.54 : x
  2. Step 2: Convert to fraction form
    978,557.84/1,350,455.28 = 611,252.54/x
  3. Step 3: Cross multiply
    978,557.84x = 1,350,455.28 × 611,252.54
  4. Step 4: Simplify right side
    978,557.84x = 825,469,220,056.41
  5. Step 5: Solve for x
    x = 825,469,220,056.41/978,557.84
  6. Step 6: Final answer
    x = 843,556.90

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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.