Home / 286,261.76-394,391.34-221,508.32

Finding the Fourth Proportional to 286,261.76, 394,391.34 and 221,508.32

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Solution

The fourth proportional to 286,261.76, 394,391.34 and 221,508.32 is: 305,178.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,261.76 : 394,391.34 = 221,508.32 : x
  2. Step 2: Convert to fraction form
    286,261.76/394,391.34 = 221,508.32/x
  3. Step 3: Cross multiply
    286,261.76x = 394,391.34 × 221,508.32
  4. Step 4: Simplify right side
    286,261.76x = 87,360,963,145.95
  5. Step 5: Solve for x
    x = 87,360,963,145.95/286,261.76
  6. Step 6: Final answer
    x = 305,178.60

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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.