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Finding the Fourth Proportional to 308,056.70, 425,103.05 and 172,063.58

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Solution

The fourth proportional to 308,056.70, 425,103.05 and 172,063.58 is: 237,439.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,056.70 : 425,103.05 = 172,063.58 : x
  2. Step 2: Convert to fraction form
    308,056.70/425,103.05 = 172,063.58/x
  3. Step 3: Cross multiply
    308,056.70x = 425,103.05 × 172,063.58
  4. Step 4: Simplify right side
    308,056.70x = 73,144,750,956.56
  5. Step 5: Solve for x
    x = 73,144,750,956.56/308,056.70
  6. Step 6: Final answer
    x = 237,439.25

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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.