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Finding the Fourth Proportional to 918,171.90, 1,286,769.30 and 918,171.90

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Solution

The fourth proportional to 918,171.90, 1,286,769.30 and 918,171.90 is: 1,286,769.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,171.90 : 1,286,769.30 = 918,171.90 : x
  2. Step 2: Convert to fraction form
    918,171.90/1,286,769.30 = 918,171.90/x
  3. Step 3: Cross multiply
    918,171.90x = 1,286,769.30 × 918,171.90
  4. Step 4: Simplify right side
    918,171.90x = 1,181,475,413,042.67
  5. Step 5: Solve for x
    x = 1,181,475,413,042.67/918,171.90
  6. Step 6: Final answer
    x = 1,286,769.30

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.