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Finding the Fourth Proportional to 308,609.14, 425,870.73 and 172,640.16

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Solution

The fourth proportional to 308,609.14, 425,870.73 and 172,640.16 is: 238,237.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,609.14 : 425,870.73 = 172,640.16 : x
  2. Step 2: Convert to fraction form
    308,609.14/425,870.73 = 172,640.16/x
  3. Step 3: Cross multiply
    308,609.14x = 425,870.73 × 172,640.16
  4. Step 4: Simplify right side
    308,609.14x = 73,522,390,534.92
  5. Step 5: Solve for x
    x = 73,522,390,534.92/308,609.14
  6. Step 6: Final answer
    x = 238,237.89

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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.