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Finding the Fourth Proportional to 839,802.80, 1,259,704.20 and 503,879.60

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Solution

The fourth proportional to 839,802.80, 1,259,704.20 and 503,879.60 is: 755,819.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,802.80 : 1,259,704.20 = 503,879.60 : x
  2. Step 2: Convert to fraction form
    839,802.80/1,259,704.20 = 503,879.60/x
  3. Step 3: Cross multiply
    839,802.80x = 1,259,704.20 × 503,879.60
  4. Step 4: Simplify right side
    839,802.80x = 634,739,248,414.32
  5. Step 5: Solve for x
    x = 634,739,248,414.32/839,802.80
  6. Step 6: Final answer
    x = 755,819.40

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Double scale
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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.