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Finding the Fourth Proportional to 642.69, 964.35 and 334.89

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Solution

The fourth proportional to 642.69, 964.35 and 334.89 is: 502.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.69 : 964.35 = 334.89 : x
  2. Step 2: Convert to fraction form
    642.69/964.35 = 334.89/x
  3. Step 3: Cross multiply
    642.69x = 964.35 × 334.89
  4. Step 4: Simplify right side
    642.69x = 322,951.17
  5. Step 5: Solve for x
    x = 322,951.17/642.69
  6. Step 6: Final answer
    x = 502.50

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1.5x scale

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.