Home / 709,685.28-979,357.32-387,408.96

Finding the Fourth Proportional to 709,685.28, 979,357.32 and 387,408.96

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Solution

The fourth proportional to 709,685.28, 979,357.32 and 387,408.96 is: 534,619.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,685.28 : 979,357.32 = 387,408.96 : x
  2. Step 2: Convert to fraction form
    709,685.28/979,357.32 = 387,408.96/x
  3. Step 3: Cross multiply
    709,685.28x = 979,357.32 × 387,408.96
  4. Step 4: Simplify right side
    709,685.28x = 379,411,800,809.59
  5. Step 5: Solve for x
    x = 379,411,800,809.59/709,685.28
  6. Step 6: Final answer
    x = 534,619.80

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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.