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Finding the Fourth Proportional to 629,118, 868,192.74 and 342,637.86

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Solution

The fourth proportional to 629,118, 868,192.74 and 342,637.86 is: 472,845.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,118 : 868,192.74 = 342,637.86 : x
  2. Step 2: Convert to fraction form
    629,118/868,192.74 = 342,637.86/x
  3. Step 3: Cross multiply
    629,118x = 868,192.74 × 342,637.86
  4. Step 4: Simplify right side
    629,118x = 297,475,702,501.14
  5. Step 5: Solve for x
    x = 297,475,702,501.14/629,118
  6. Step 6: Final answer
    x = 472,845.64

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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.