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Finding the Fourth Proportional to 486,449.08, 669,813.56 and 440,830.15

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Solution

The fourth proportional to 486,449.08, 669,813.56 and 440,830.15 is: 606,998.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,449.08 : 669,813.56 = 440,830.15 : x
  2. Step 2: Convert to fraction form
    486,449.08/669,813.56 = 440,830.15/x
  3. Step 3: Cross multiply
    486,449.08x = 669,813.56 × 440,830.15
  4. Step 4: Simplify right side
    486,449.08x = 295,274,012,126.83
  5. Step 5: Solve for x
    x = 295,274,012,126.83/486,449.08
  6. Step 6: Final answer
    x = 606,998.81

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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.