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Finding the Fourth Proportional to 990,431.10, 1,481,710.05 and 858,773.70

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Solution

The fourth proportional to 990,431.10, 1,481,710.05 and 858,773.70 is: 1,284,747.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,431.10 : 1,481,710.05 = 858,773.70 : x
  2. Step 2: Convert to fraction form
    990,431.10/1,481,710.05 = 858,773.70/x
  3. Step 3: Cross multiply
    990,431.10x = 1,481,710.05 × 858,773.70
  4. Step 4: Simplify right side
    990,431.10x = 1,272,453,621,965.69
  5. Step 5: Solve for x
    x = 1,272,453,621,965.69/990,431.10
  6. Step 6: Final answer
    x = 1,284,747.24

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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.