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Finding the Fourth Proportional to 987,165, 1,480,747.70 and 356,078.75

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Solution

The fourth proportional to 987,165, 1,480,747.70 and 356,078.75 is: 534,118.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,165 : 1,480,747.70 = 356,078.75 : x
  2. Step 2: Convert to fraction form
    987,165/1,480,747.70 = 356,078.75/x
  3. Step 3: Cross multiply
    987,165x = 1,480,747.70 × 356,078.75
  4. Step 4: Simplify right side
    987,165x = 527,262,783,567.83
  5. Step 5: Solve for x
    x = 527,262,783,567.83/987,165
  6. Step 6: Final answer
    x = 534,118.19

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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.