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Finding the Fourth Proportional to 750,019.20, 1,035,029.22 and 405,855.10

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Solution

The fourth proportional to 750,019.20, 1,035,029.22 and 405,855.10 is: 560,081.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    750,019.20 : 1,035,029.22 = 405,855.10 : x
  2. Step 2: Convert to fraction form
    750,019.20/1,035,029.22 = 405,855.10/x
  3. Step 3: Cross multiply
    750,019.20x = 1,035,029.22 × 405,855.10
  4. Step 4: Simplify right side
    750,019.20x = 420,071,887,586.02
  5. Step 5: Solve for x
    x = 420,071,887,586.02/750,019.20
  6. Step 6: Final answer
    x = 560,081.51

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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.