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Finding the Fourth Proportional to 1,500,710.96, 2,070,978.91 and 812,379.44

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Solution

The fourth proportional to 1,500,710.96, 2,070,978.91 and 812,379.44 is: 1,121,082.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,500,710.96 : 2,070,978.91 = 812,379.44 : x
  2. Step 2: Convert to fraction form
    1,500,710.96/2,070,978.91 = 812,379.44/x
  3. Step 3: Cross multiply
    1,500,710.96x = 2,070,978.91 × 812,379.44
  4. Step 4: Simplify right side
    1,500,710.96x = 1,682,420,690,304.11
  5. Step 5: Solve for x
    x = 1,682,420,690,304.11/1,500,710.96
  6. Step 6: Final answer
    x = 1,121,082.43

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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.