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Finding the Fourth Proportional to 310.50, 429.30 and 296.90

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Solution

The fourth proportional to 310.50, 429.30 and 296.90 is: 410.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.50 : 429.30 = 296.90 : x
  2. Step 2: Convert to fraction form
    310.50/429.30 = 296.90/x
  3. Step 3: Cross multiply
    310.50x = 429.30 × 296.90
  4. Step 4: Simplify right side
    310.50x = 127,459.17
  5. Step 5: Solve for x
    x = 127,459.17/310.50
  6. Step 6: Final answer
    x = 410.50

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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.