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Finding the Fourth Proportional to 308,005.61, 425,043.18 and 172,041.44

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Solution

The fourth proportional to 308,005.61, 425,043.18 and 172,041.44 is: 237,414.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,005.61 : 425,043.18 = 172,041.44 : x
  2. Step 2: Convert to fraction form
    308,005.61/425,043.18 = 172,041.44/x
  3. Step 3: Cross multiply
    308,005.61x = 425,043.18 × 172,041.44
  4. Step 4: Simplify right side
    308,005.61x = 73,125,038,624.16
  5. Step 5: Solve for x
    x = 73,125,038,624.16/308,005.61
  6. Step 6: Final answer
    x = 237,414.64

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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.