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Finding the Fourth Proportional to 622,245.90, 858,474.78 and 407,508.42

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Solution

The fourth proportional to 622,245.90, 858,474.78 and 407,508.42 is: 562,214.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,245.90 : 858,474.78 = 407,508.42 : x
  2. Step 2: Convert to fraction form
    622,245.90/858,474.78 = 407,508.42/x
  3. Step 3: Cross multiply
    622,245.90x = 858,474.78 × 407,508.42
  4. Step 4: Simplify right side
    622,245.90x = 349,835,701,207.65
  5. Step 5: Solve for x
    x = 349,835,701,207.65/622,245.90
  6. Step 6: Final answer
    x = 562,214.55

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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.