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Finding the Fourth Proportional to 709,349.35, 978,893.96 and 387,064.83

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Solution

The fourth proportional to 709,349.35, 978,893.96 and 387,064.83 is: 534,145.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,349.35 : 978,893.96 = 387,064.83 : x
  2. Step 2: Convert to fraction form
    709,349.35/978,893.96 = 387,064.83/x
  3. Step 3: Cross multiply
    709,349.35x = 978,893.96 × 387,064.83
  4. Step 4: Simplify right side
    709,349.35x = 378,895,422,621.92
  5. Step 5: Solve for x
    x = 378,895,422,621.92/709,349.35
  6. Step 6: Final answer
    x = 534,145.02

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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.