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Finding the Fourth Proportional to 709,404.18, 978,998.54 and 387,135.04

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Solution

The fourth proportional to 709,404.18, 978,998.54 and 387,135.04 is: 534,257.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,404.18 : 978,998.54 = 387,135.04 : x
  2. Step 2: Convert to fraction form
    709,404.18/978,998.54 = 387,135.04/x
  3. Step 3: Cross multiply
    709,404.18x = 978,998.54 × 387,135.04
  4. Step 4: Simplify right side
    709,404.18x = 379,004,638,942.84
  5. Step 5: Solve for x
    x = 379,004,638,942.84/709,404.18
  6. Step 6: Final answer
    x = 534,257.69

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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.