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Finding the Fourth Proportional to 310.32, 429.84 and 303.84

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Solution

The fourth proportional to 310.32, 429.84 and 303.84 is: 420.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.32 : 429.84 = 303.84 : x
  2. Step 2: Convert to fraction form
    310.32/429.84 = 303.84/x
  3. Step 3: Cross multiply
    310.32x = 429.84 × 303.84
  4. Step 4: Simplify right side
    310.32x = 130,602.59
  5. Step 5: Solve for x
    x = 130,602.59/310.32
  6. Step 6: Final answer
    x = 420.86

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.