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Finding the Fourth Proportional to 308,420.96, 425,565.36 and 172,457.60

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Solution

The fourth proportional to 308,420.96, 425,565.36 and 172,457.60 is: 237,960.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,420.96 : 425,565.36 = 172,457.60 : x
  2. Step 2: Convert to fraction form
    308,420.96/425,565.36 = 172,457.60/x
  3. Step 3: Cross multiply
    308,420.96x = 425,565.36 × 172,457.60
  4. Step 4: Simplify right side
    308,420.96x = 73,391,980,628.74
  5. Step 5: Solve for x
    x = 73,391,980,628.74/308,420.96
  6. Step 6: Final answer
    x = 237,960.42

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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.