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Finding the Fourth Proportional to 308,561.10, 425,853.70 and 172,602.60

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Solution

The fourth proportional to 308,561.10, 425,853.70 and 172,602.60 is: 238,213.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,561.10 : 425,853.70 = 172,602.60 : x
  2. Step 2: Convert to fraction form
    308,561.10/425,853.70 = 172,602.60/x
  3. Step 3: Cross multiply
    308,561.10x = 425,853.70 × 172,602.60
  4. Step 4: Simplify right side
    308,561.10x = 73,503,454,782.05
  5. Step 5: Solve for x
    x = 73,503,454,782.05/308,561.10
  6. Step 6: Final answer
    x = 238,213.62

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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.