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Finding the Fourth Proportional to 308,627.70, 425,945.46 and 172,669.20

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Solution

The fourth proportional to 308,627.70, 425,945.46 and 172,669.20 is: 238,305.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,627.70 : 425,945.46 = 172,669.20 : x
  2. Step 2: Convert to fraction form
    308,627.70/425,945.46 = 172,669.20/x
  3. Step 3: Cross multiply
    308,627.70x = 425,945.46 × 172,669.20
  4. Step 4: Simplify right side
    308,627.70x = 73,547,661,821.83
  5. Step 5: Solve for x
    x = 73,547,661,821.83/308,627.70
  6. Step 6: Final answer
    x = 238,305.45

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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.