Home / 709,821.32-979,548.39-387,531.38

Finding the Fourth Proportional to 709,821.32, 979,548.39 and 387,531.38

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Solution

The fourth proportional to 709,821.32, 979,548.39 and 387,531.38 is: 534,790.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,821.32 : 979,548.39 = 387,531.38 : x
  2. Step 2: Convert to fraction form
    709,821.32/979,548.39 = 387,531.38/x
  3. Step 3: Cross multiply
    709,821.32x = 979,548.39 × 387,531.38
  4. Step 4: Simplify right side
    709,821.32x = 379,605,734,455.74
  5. Step 5: Solve for x
    x = 379,605,734,455.74/709,821.32
  6. Step 6: Final answer
    x = 534,790.55

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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.