Home / 225,291.08-310,889.34-128,480.72

Finding the Fourth Proportional to 225,291.08, 310,889.34 and 128,480.72

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Solution

The fourth proportional to 225,291.08, 310,889.34 and 128,480.72 is: 177,296.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,291.08 : 310,889.34 = 128,480.72 : x
  2. Step 2: Convert to fraction form
    225,291.08/310,889.34 = 128,480.72/x
  3. Step 3: Cross multiply
    225,291.08x = 310,889.34 × 128,480.72
  4. Step 4: Simplify right side
    225,291.08x = 39,943,286,243.52
  5. Step 5: Solve for x
    x = 39,943,286,243.52/225,291.08
  6. Step 6: Final answer
    x = 177,296.35

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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.