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Finding the Fourth Proportional to 622,708.62, 859,311.26 and 347,051.78

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Solution

The fourth proportional to 622,708.62, 859,311.26 and 347,051.78 is: 478,916.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,708.62 : 859,311.26 = 347,051.78 : x
  2. Step 2: Convert to fraction form
    622,708.62/859,311.26 = 347,051.78/x
  3. Step 3: Cross multiply
    622,708.62x = 859,311.26 × 347,051.78
  4. Step 4: Simplify right side
    622,708.62x = 298,225,502,357.04
  5. Step 5: Solve for x
    x = 298,225,502,357.04/622,708.62
  6. Step 6: Final answer
    x = 478,916.61

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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.