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Finding the Fourth Proportional to 285,603.48, 394,143.30 and 172,404.36

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Solution

The fourth proportional to 285,603.48, 394,143.30 and 172,404.36 is: 237,924.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,603.48 : 394,143.30 = 172,404.36 : x
  2. Step 2: Convert to fraction form
    285,603.48/394,143.30 = 172,404.36/x
  3. Step 3: Cross multiply
    285,603.48x = 394,143.30 × 172,404.36
  4. Step 4: Simplify right side
    285,603.48x = 67,952,023,384.79
  5. Step 5: Solve for x
    x = 67,952,023,384.79/285,603.48
  6. Step 6: Final answer
    x = 237,924.35

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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.