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Finding the Fourth Proportional to 709,355.56, 978,934.31 and 387,083.34

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Solution

The fourth proportional to 709,355.56, 978,934.31 and 387,083.34 is: 534,187.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,355.56 : 978,934.31 = 387,083.34 : x
  2. Step 2: Convert to fraction form
    709,355.56/978,934.31 = 387,083.34/x
  3. Step 3: Cross multiply
    709,355.56x = 978,934.31 × 387,083.34
  4. Step 4: Simplify right side
    709,355.56x = 378,929,163,173.23
  5. Step 5: Solve for x
    x = 378,929,163,173.23/709,355.56
  6. Step 6: Final answer
    x = 534,187.91

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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.