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Finding the Fourth Proportional to 987,987.92, 1,362,671.04 and 850,401.01

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Solution

The fourth proportional to 987,987.92, 1,362,671.04 and 850,401.01 is: 1,172,905.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,987.92 : 1,362,671.04 = 850,401.01 : x
  2. Step 2: Convert to fraction form
    987,987.92/1,362,671.04 = 850,401.01/x
  3. Step 3: Cross multiply
    987,987.92x = 1,362,671.04 × 850,401.01
  4. Step 4: Simplify right side
    987,987.92x = 1,158,816,833,606.09
  5. Step 5: Solve for x
    x = 1,158,816,833,606.09/987,987.92
  6. Step 6: Final answer
    x = 1,172,905.88

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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.