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Finding the Fourth Proportional to 221,256.80, 331,885.20 and 127,653.20

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Solution

The fourth proportional to 221,256.80, 331,885.20 and 127,653.20 is: 191,479.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,256.80 : 331,885.20 = 127,653.20 : x
  2. Step 2: Convert to fraction form
    221,256.80/331,885.20 = 127,653.20/x
  3. Step 3: Cross multiply
    221,256.80x = 331,885.20 × 127,653.20
  4. Step 4: Simplify right side
    221,256.80x = 42,366,207,812.64
  5. Step 5: Solve for x
    x = 42,366,207,812.64/221,256.80
  6. Step 6: Final answer
    x = 191,479.80

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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.