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Finding the Fourth Proportional to 386,790.66, 579,625.20 and 274,690.44

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Solution

The fourth proportional to 386,790.66, 579,625.20 and 274,690.44 is: 411,637.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,790.66 : 579,625.20 = 274,690.44 : x
  2. Step 2: Convert to fraction form
    386,790.66/579,625.20 = 274,690.44/x
  3. Step 3: Cross multiply
    386,790.66x = 579,625.20 × 274,690.44
  4. Step 4: Simplify right side
    386,790.66x = 159,217,501,223.09
  5. Step 5: Solve for x
    x = 159,217,501,223.09/386,790.66
  6. Step 6: Final answer
    x = 411,637.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.