Home / 709,736.88-979,438.56-387,447.12

Finding the Fourth Proportional to 709,736.88, 979,438.56 and 387,447.12

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Solution

The fourth proportional to 709,736.88, 979,438.56 and 387,447.12 is: 534,677.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,736.88 : 979,438.56 = 387,447.12 : x
  2. Step 2: Convert to fraction form
    709,736.88/979,438.56 = 387,447.12/x
  3. Step 3: Cross multiply
    709,736.88x = 979,438.56 × 387,447.12
  4. Step 4: Simplify right side
    709,736.88x = 379,480,649,288.95
  5. Step 5: Solve for x
    x = 379,480,649,288.95/709,736.88
  6. Step 6: Final answer
    x = 534,677.93

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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.