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Finding the Fourth Proportional to 484,121.72, 668,041.16 and 280,131.96

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Solution

The fourth proportional to 484,121.72, 668,041.16 and 280,131.96 is: 386,555.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,121.72 : 668,041.16 = 280,131.96 : x
  2. Step 2: Convert to fraction form
    484,121.72/668,041.16 = 280,131.96/x
  3. Step 3: Cross multiply
    484,121.72x = 668,041.16 × 280,131.96
  4. Step 4: Simplify right side
    484,121.72x = 187,139,679,511.47
  5. Step 5: Solve for x
    x = 187,139,679,511.47/484,121.72
  6. Step 6: Final answer
    x = 386,555.02

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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.