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Finding the Fourth Proportional to 310.79, 465.60 and 207.77

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Solution

The fourth proportional to 310.79, 465.60 and 207.77 is: 311.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.79 : 465.60 = 207.77 : x
  2. Step 2: Convert to fraction form
    310.79/465.60 = 207.77/x
  3. Step 3: Cross multiply
    310.79x = 465.60 × 207.77
  4. Step 4: Simplify right side
    310.79x = 96,737.71
  5. Step 5: Solve for x
    x = 96,737.71/310.79
  6. Step 6: Final answer
    x = 311.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.