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Finding the Fourth Proportional to 308,662.50, 425,970.80 and 172,688.34

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Solution

The fourth proportional to 308,662.50, 425,970.80 and 172,688.34 is: 238,319.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,662.50 : 425,970.80 = 172,688.34 : x
  2. Step 2: Convert to fraction form
    308,662.50/425,970.80 = 172,688.34/x
  3. Step 3: Cross multiply
    308,662.50x = 425,970.80 × 172,688.34
  4. Step 4: Simplify right side
    308,662.50x = 73,560,189,477.03
  5. Step 5: Solve for x
    x = 73,560,189,477.03/308,662.50
  6. Step 6: Final answer
    x = 238,319.17

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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.