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Finding the Fourth Proportional to 343,251.20, 473,686.80 and 209,115.20

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Solution

The fourth proportional to 343,251.20, 473,686.80 and 209,115.20 is: 288,579.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,251.20 : 473,686.80 = 209,115.20 : x
  2. Step 2: Convert to fraction form
    343,251.20/473,686.80 = 209,115.20/x
  3. Step 3: Cross multiply
    343,251.20x = 473,686.80 × 209,115.20
  4. Step 4: Simplify right side
    343,251.20x = 99,055,109,919.36
  5. Step 5: Solve for x
    x = 99,055,109,919.36/343,251.20
  6. Step 6: Final answer
    x = 288,579.06

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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.