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Finding the Fourth Proportional to 225,298.40, 310,905.63 and 128,500.07

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Solution

The fourth proportional to 225,298.40, 310,905.63 and 128,500.07 is: 177,326.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,298.40 : 310,905.63 = 128,500.07 : x
  2. Step 2: Convert to fraction form
    225,298.40/310,905.63 = 128,500.07/x
  3. Step 3: Cross multiply
    225,298.40x = 310,905.63 × 128,500.07
  4. Step 4: Simplify right side
    225,298.40x = 39,951,395,232.01
  5. Step 5: Solve for x
    x = 39,951,395,232.01/225,298.40
  6. Step 6: Final answer
    x = 177,326.58

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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.