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Finding the Fourth Proportional to 310.01, 430.77 and 306.63

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Solution

The fourth proportional to 310.01, 430.77 and 306.63 is: 426.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.01 : 430.77 = 306.63 : x
  2. Step 2: Convert to fraction form
    310.01/430.77 = 306.63/x
  3. Step 3: Cross multiply
    310.01x = 430.77 × 306.63
  4. Step 4: Simplify right side
    310.01x = 132,088.15
  5. Step 5: Solve for x
    x = 132,088.15/310.01
  6. Step 6: Final answer
    x = 426.08

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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.