Home / 709,581.12-979,213.92-387,288.72

Finding the Fourth Proportional to 709,581.12, 979,213.92 and 387,288.72

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Solution

The fourth proportional to 709,581.12, 979,213.92 and 387,288.72 is: 534,454.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,581.12 : 979,213.92 = 387,288.72 : x
  2. Step 2: Convert to fraction form
    709,581.12/979,213.92 = 387,288.72/x
  3. Step 3: Cross multiply
    709,581.12x = 979,213.92 × 387,288.72
  4. Step 4: Simplify right side
    709,581.12x = 379,238,505,682.98
  5. Step 5: Solve for x
    x = 379,238,505,682.98/709,581.12
  6. Step 6: Final answer
    x = 534,454.05

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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.