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Finding the Fourth Proportional to 1,296,764.32, 1,789,911.12 and 753,023.20

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Solution

The fourth proportional to 1,296,764.32, 1,789,911.12 and 753,023.20 is: 1,039,390.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296,764.32 : 1,789,911.12 = 753,023.20 : x
  2. Step 2: Convert to fraction form
    1,296,764.32/1,789,911.12 = 753,023.20/x
  3. Step 3: Cross multiply
    1,296,764.32x = 1,789,911.12 × 753,023.20
  4. Step 4: Simplify right side
    1,296,764.32x = 1,347,844,599,297.98
  5. Step 5: Solve for x
    x = 1,347,844,599,297.98/1,296,764.32
  6. Step 6: Final answer
    x = 1,039,390.57

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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.