Home / 709,764.15-979,489.35-387,487.83

Finding the Fourth Proportional to 709,764.15, 979,489.35 and 387,487.83

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Solution

The fourth proportional to 709,764.15, 979,489.35 and 387,487.83 is: 534,741.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,764.15 : 979,489.35 = 387,487.83 : x
  2. Step 2: Convert to fraction form
    709,764.15/979,489.35 = 387,487.83/x
  3. Step 3: Cross multiply
    709,764.15x = 979,489.35 × 387,487.83
  4. Step 4: Simplify right side
    709,764.15x = 379,540,202,739.61
  5. Step 5: Solve for x
    x = 379,540,202,739.61/709,764.15
  6. Step 6: Final answer
    x = 534,741.30

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Double scale
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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.