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Finding the Fourth Proportional to 709,542.19, 979,160.56 and 387,249.67

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Solution

The fourth proportional to 709,542.19, 979,160.56 and 387,249.67 is: 534,400.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,542.19 : 979,160.56 = 387,249.67 : x
  2. Step 2: Convert to fraction form
    709,542.19/979,160.56 = 387,249.67/x
  3. Step 3: Cross multiply
    709,542.19x = 979,160.56 × 387,249.67
  4. Step 4: Simplify right side
    709,542.19x = 379,179,603,737.02
  5. Step 5: Solve for x
    x = 379,179,603,737.02/709,542.19
  6. Step 6: Final answer
    x = 534,400.36

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1.5x scale

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.