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Finding the Fourth Proportional to 310.03, 429.59 and 306.25

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Solution

The fourth proportional to 310.03, 429.59 and 306.25 is: 424.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.03 : 429.59 = 306.25 : x
  2. Step 2: Convert to fraction form
    310.03/429.59 = 306.25/x
  3. Step 3: Cross multiply
    310.03x = 429.59 × 306.25
  4. Step 4: Simplify right side
    310.03x = 131,561.63
  5. Step 5: Solve for x
    x = 131,561.63/310.03
  6. Step 6: Final answer
    x = 424.35

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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.