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Finding the Fourth Proportional to 677,998.80, 1,016,998.20 and 520,534.80

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Solution

The fourth proportional to 677,998.80, 1,016,998.20 and 520,534.80 is: 780,802.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,998.80 : 1,016,998.20 = 520,534.80 : x
  2. Step 2: Convert to fraction form
    677,998.80/1,016,998.20 = 520,534.80/x
  3. Step 3: Cross multiply
    677,998.80x = 1,016,998.20 × 520,534.80
  4. Step 4: Simplify right side
    677,998.80x = 529,382,954,637.36
  5. Step 5: Solve for x
    x = 529,382,954,637.36/677,998.80
  6. Step 6: Final answer
    x = 780,802.20

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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.