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Finding the Fourth Proportional to 353,049.30, 487,319.49 and 225,725.40

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Solution

The fourth proportional to 353,049.30, 487,319.49 and 225,725.40 is: 311,572.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,049.30 : 487,319.49 = 225,725.40 : x
  2. Step 2: Convert to fraction form
    353,049.30/487,319.49 = 225,725.40/x
  3. Step 3: Cross multiply
    353,049.30x = 487,319.49 × 225,725.40
  4. Step 4: Simplify right side
    353,049.30x = 110,000,386,808.05
  5. Step 5: Solve for x
    x = 110,000,386,808.05/353,049.30
  6. Step 6: Final answer
    x = 311,572.31

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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.