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Finding the Fourth Proportional to 308,411.90, 425,588.73 and 172,457.06

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Solution

The fourth proportional to 308,411.90, 425,588.73 and 172,457.06 is: 237,979.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,411.90 : 425,588.73 = 172,457.06 : x
  2. Step 2: Convert to fraction form
    308,411.90/425,588.73 = 172,457.06/x
  3. Step 3: Cross multiply
    308,411.90x = 425,588.73 × 172,457.06
  4. Step 4: Simplify right side
    308,411.90x = 73,395,781,144.93
  5. Step 5: Solve for x
    x = 73,395,781,144.93/308,411.90
  6. Step 6: Final answer
    x = 237,979.73

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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.