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Finding the Fourth Proportional to 308,953.50, 426,299.40 and 172,989.60

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Solution

The fourth proportional to 308,953.50, 426,299.40 and 172,989.60 is: 238,694.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,953.50 : 426,299.40 = 172,989.60 : x
  2. Step 2: Convert to fraction form
    308,953.50/426,299.40 = 172,989.60/x
  3. Step 3: Cross multiply
    308,953.50x = 426,299.40 × 172,989.60
  4. Step 4: Simplify right side
    308,953.50x = 73,745,362,686.24
  5. Step 5: Solve for x
    x = 73,745,362,686.24/308,953.50
  6. Step 6: Final answer
    x = 238,694.05

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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.