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Finding the Fourth Proportional to 225,286.40, 310,860.48 and 129,774.40

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Solution

The fourth proportional to 225,286.40, 310,860.48 and 129,774.40 is: 179,068.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,286.40 : 310,860.48 = 129,774.40 : x
  2. Step 2: Convert to fraction form
    225,286.40/310,860.48 = 129,774.40/x
  3. Step 3: Cross multiply
    225,286.40x = 310,860.48 × 129,774.40
  4. Step 4: Simplify right side
    225,286.40x = 40,341,732,275.71
  5. Step 5: Solve for x
    x = 40,341,732,275.71/225,286.40
  6. Step 6: Final answer
    x = 179,068.65

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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.