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Finding the Fourth Proportional to 484,346.72, 668,388 and 280,406.24

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Solution

The fourth proportional to 484,346.72, 668,388 and 280,406.24 is: 386,954.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,346.72 : 668,388 = 280,406.24 : x
  2. Step 2: Convert to fraction form
    484,346.72/668,388 = 280,406.24/x
  3. Step 3: Cross multiply
    484,346.72x = 668,388 × 280,406.24
  4. Step 4: Simplify right side
    484,346.72x = 187,420,165,941.12
  5. Step 5: Solve for x
    x = 187,420,165,941.12/484,346.72
  6. Step 6: Final answer
    x = 386,954.55

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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.