Home / 709,406.68-979,002.05-387,137.58

Finding the Fourth Proportional to 709,406.68, 979,002.05 and 387,137.58

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Solution

The fourth proportional to 709,406.68, 979,002.05 and 387,137.58 is: 534,261.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,406.68 : 979,002.05 = 387,137.58 : x
  2. Step 2: Convert to fraction form
    709,406.68/979,002.05 = 387,137.58/x
  3. Step 3: Cross multiply
    709,406.68x = 979,002.05 × 387,137.58
  4. Step 4: Simplify right side
    709,406.68x = 379,008,478,845.09
  5. Step 5: Solve for x
    x = 379,008,478,845.09/709,406.68
  6. Step 6: Final answer
    x = 534,261.22

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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.