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Finding the Fourth Proportional to 221,215.70, 331,564.35 and 165,746.90

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Solution

The fourth proportional to 221,215.70, 331,564.35 and 165,746.90 is: 248,426.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,215.70 : 331,564.35 = 165,746.90 : x
  2. Step 2: Convert to fraction form
    221,215.70/331,564.35 = 165,746.90/x
  3. Step 3: Cross multiply
    221,215.70x = 331,564.35 × 165,746.90
  4. Step 4: Simplify right side
    221,215.70x = 54,955,763,163.02
  5. Step 5: Solve for x
    x = 54,955,763,163.02/221,215.70
  6. Step 6: Final answer
    x = 248,426.14

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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.