Home / 515,581.88-711,588.57-300,721.94

Finding the Fourth Proportional to 515,581.88, 711,588.57 and 300,721.94

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Solution

The fourth proportional to 515,581.88, 711,588.57 and 300,721.94 is: 415,046.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,581.88 : 711,588.57 = 300,721.94 : x
  2. Step 2: Convert to fraction form
    515,581.88/711,588.57 = 300,721.94/x
  3. Step 3: Cross multiply
    515,581.88x = 711,588.57 × 300,721.94
  4. Step 4: Simplify right side
    515,581.88x = 213,990,297,031.20
  5. Step 5: Solve for x
    x = 213,990,297,031.20/515,581.88
  6. Step 6: Final answer
    x = 415,046.19

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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.