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Finding the Fourth Proportional to 225,256.89, 310,889.42 and 128,460.95

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Solution

The fourth proportional to 225,256.89, 310,889.42 and 128,460.95 is: 177,296.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,256.89 : 310,889.42 = 128,460.95 : x
  2. Step 2: Convert to fraction form
    225,256.89/310,889.42 = 128,460.95/x
  3. Step 3: Cross multiply
    225,256.89x = 310,889.42 × 128,460.95
  4. Step 4: Simplify right side
    225,256.89x = 39,937,150,238.15
  5. Step 5: Solve for x
    x = 39,937,150,238.15/225,256.89
  6. Step 6: Final answer
    x = 177,296.02

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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.