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Finding the Fourth Proportional to 225,320.84, 310,976.91 and 128,524.22

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Solution

The fourth proportional to 225,320.84, 310,976.91 and 128,524.22 is: 177,382.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,320.84 : 310,976.91 = 128,524.22 : x
  2. Step 2: Convert to fraction form
    225,320.84/310,976.91 = 128,524.22/x
  3. Step 3: Cross multiply
    225,320.84x = 310,976.91 × 128,524.22
  4. Step 4: Simplify right side
    225,320.84x = 39,968,062,598.25
  5. Step 5: Solve for x
    x = 39,968,062,598.25/225,320.84
  6. Step 6: Final answer
    x = 177,382.90

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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.