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Finding the Fourth Proportional to 1,319,244.80, 1,978,003.20 and 520,044.80

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Solution

The fourth proportional to 1,319,244.80, 1,978,003.20 and 520,044.80 is: 779,726.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,244.80 : 1,978,003.20 = 520,044.80 : x
  2. Step 2: Convert to fraction form
    1,319,244.80/1,978,003.20 = 520,044.80/x
  3. Step 3: Cross multiply
    1,319,244.80x = 1,978,003.20 × 520,044.80
  4. Step 4: Simplify right side
    1,319,244.80x = 1,028,650,278,543.36
  5. Step 5: Solve for x
    x = 1,028,650,278,543.36/1,319,244.80
  6. Step 6: Final answer
    x = 779,726.61

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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.