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Finding the Fourth Proportional to 520,067.80, 780,101.70 and 220,497.40

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Solution

The fourth proportional to 520,067.80, 780,101.70 and 220,497.40 is: 330,746.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,067.80 : 780,101.70 = 220,497.40 : x
  2. Step 2: Convert to fraction form
    520,067.80/780,101.70 = 220,497.40/x
  3. Step 3: Cross multiply
    520,067.80x = 780,101.70 × 220,497.40
  4. Step 4: Simplify right side
    520,067.80x = 172,010,396,585.58
  5. Step 5: Solve for x
    x = 172,010,396,585.58/520,067.80
  6. Step 6: Final answer
    x = 330,746.10

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.