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Finding the Fourth Proportional to 310,905.38, 429,121.14 and 181,903.88

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Solution

The fourth proportional to 310,905.38, 429,121.14 and 181,903.88 is: 251,069.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,905.38 : 429,121.14 = 181,903.88 : x
  2. Step 2: Convert to fraction form
    310,905.38/429,121.14 = 181,903.88/x
  3. Step 3: Cross multiply
    310,905.38x = 429,121.14 × 181,903.88
  4. Step 4: Simplify right side
    310,905.38x = 78,058,800,356.02
  5. Step 5: Solve for x
    x = 78,058,800,356.02/310,905.38
  6. Step 6: Final answer
    x = 251,069.31

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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.