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Finding the Fourth Proportional to 986,464.80, 1,479,697.20 and 720,744.30

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Solution

The fourth proportional to 986,464.80, 1,479,697.20 and 720,744.30 is: 1,081,116.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    986,464.80 : 1,479,697.20 = 720,744.30 : x
  2. Step 2: Convert to fraction form
    986,464.80/1,479,697.20 = 720,744.30/x
  3. Step 3: Cross multiply
    986,464.80x = 1,479,697.20 × 720,744.30
  4. Step 4: Simplify right side
    986,464.80x = 1,066,483,322,625.96
  5. Step 5: Solve for x
    x = 1,066,483,322,625.96/986,464.80
  6. Step 6: Final answer
    x = 1,081,116.45

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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.