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Finding the Fourth Proportional to 308,668.48, 425,983.62 and 172,715.32

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Solution

The fourth proportional to 308,668.48, 425,983.62 and 172,715.32 is: 238,358.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,668.48 : 425,983.62 = 172,715.32 : x
  2. Step 2: Convert to fraction form
    308,668.48/425,983.62 = 172,715.32/x
  3. Step 3: Cross multiply
    308,668.48x = 425,983.62 × 172,715.32
  4. Step 4: Simplify right side
    308,668.48x = 73,573,897,243.06
  5. Step 5: Solve for x
    x = 73,573,897,243.06/308,668.48
  6. Step 6: Final answer
    x = 238,358.96

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1.5x scale

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.