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Finding the Fourth Proportional to 484,319.76, 668,350.84 and 280,379.31

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Solution

The fourth proportional to 484,319.76, 668,350.84 and 280,379.31 is: 386,917.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,319.76 : 668,350.84 = 280,379.31 : x
  2. Step 2: Convert to fraction form
    484,319.76/668,350.84 = 280,379.31/x
  3. Step 3: Cross multiply
    484,319.76x = 668,350.84 × 280,379.31
  4. Step 4: Simplify right side
    484,319.76x = 187,391,747,357.12
  5. Step 5: Solve for x
    x = 187,391,747,357.12/484,319.76
  6. Step 6: Final answer
    x = 386,917.41

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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.