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Finding the Fourth Proportional to 271,758.45, 405,807.71 and 221,937.45

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Solution

The fourth proportional to 271,758.45, 405,807.71 and 221,937.45 is: 331,411.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,758.45 : 405,807.71 = 221,937.45 : x
  2. Step 2: Convert to fraction form
    271,758.45/405,807.71 = 221,937.45/x
  3. Step 3: Cross multiply
    271,758.45x = 405,807.71 × 221,937.45
  4. Step 4: Simplify right side
    271,758.45x = 90,063,928,902.58
  5. Step 5: Solve for x
    x = 90,063,928,902.58/271,758.45
  6. Step 6: Final answer
    x = 331,411.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.