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Finding the Fourth Proportional to 308,404.48, 425,598.88 and 172,443.36

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Solution

The fourth proportional to 308,404.48, 425,598.88 and 172,443.36 is: 237,972.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,404.48 : 425,598.88 = 172,443.36 : x
  2. Step 2: Convert to fraction form
    308,404.48/425,598.88 = 172,443.36/x
  3. Step 3: Cross multiply
    308,404.48x = 425,598.88 × 172,443.36
  4. Step 4: Simplify right side
    308,404.48x = 73,391,700,879.44
  5. Step 5: Solve for x
    x = 73,391,700,879.44/308,404.48
  6. Step 6: Final answer
    x = 237,972.23

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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.