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Finding the Fourth Proportional to 221,080.52, 305,322.70 and 152,348.70

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Solution

The fourth proportional to 221,080.52, 305,322.70 and 152,348.70 is: 210,400.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,080.52 : 305,322.70 = 152,348.70 : x
  2. Step 2: Convert to fraction form
    221,080.52/305,322.70 = 152,348.70/x
  3. Step 3: Cross multiply
    221,080.52x = 305,322.70 × 152,348.70
  4. Step 4: Simplify right side
    221,080.52x = 46,515,515,315.18
  5. Step 5: Solve for x
    x = 46,515,515,315.18/221,080.52
  6. Step 6: Final answer
    x = 210,400.78

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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.