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Finding the Fourth Proportional to 306,988.73, 423,630.78 and 171,019.30

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Solution

The fourth proportional to 306,988.73, 423,630.78 and 171,019.30 is: 235,999.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,988.73 : 423,630.78 = 171,019.30 : x
  2. Step 2: Convert to fraction form
    306,988.73/423,630.78 = 171,019.30/x
  3. Step 3: Cross multiply
    306,988.73x = 423,630.78 × 171,019.30
  4. Step 4: Simplify right side
    306,988.73x = 72,449,039,990.94
  5. Step 5: Solve for x
    x = 72,449,039,990.94/306,988.73
  6. Step 6: Final answer
    x = 235,999.02

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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.