Home / 221,187.20-331,521.60-165,718.40

Finding the Fourth Proportional to 221,187.20, 331,521.60 and 165,718.40

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Solution

The fourth proportional to 221,187.20, 331,521.60 and 165,718.40 is: 248,383.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,187.20 : 331,521.60 = 165,718.40 : x
  2. Step 2: Convert to fraction form
    221,187.20/331,521.60 = 165,718.40/x
  3. Step 3: Cross multiply
    221,187.20x = 331,521.60 × 165,718.40
  4. Step 4: Simplify right side
    221,187.20x = 54,939,229,117.44
  5. Step 5: Solve for x
    x = 54,939,229,117.44/221,187.20
  6. Step 6: Final answer
    x = 248,383.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.