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Finding the Fourth Proportional to 642.86, 964.86 and 334.93

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Solution

The fourth proportional to 642.86, 964.86 and 334.93 is: 502.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.86 : 964.86 = 334.93 : x
  2. Step 2: Convert to fraction form
    642.86/964.86 = 334.93/x
  3. Step 3: Cross multiply
    642.86x = 964.86 × 334.93
  4. Step 4: Simplify right side
    642.86x = 323,158.15
  5. Step 5: Solve for x
    x = 323,158.15/642.86
  6. Step 6: Final answer
    x = 502.69

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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.