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Finding the Fourth Proportional to 308,715.06, 426,012.30 and 172,766.28

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Solution

The fourth proportional to 308,715.06, 426,012.30 and 172,766.28 is: 238,409.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,715.06 : 426,012.30 = 172,766.28 : x
  2. Step 2: Convert to fraction form
    308,715.06/426,012.30 = 172,766.28/x
  3. Step 3: Cross multiply
    308,715.06x = 426,012.30 × 172,766.28
  4. Step 4: Simplify right side
    308,715.06x = 73,600,560,305.24
  5. Step 5: Solve for x
    x = 73,600,560,305.24/308,715.06
  6. Step 6: Final answer
    x = 238,409.36

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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.