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Finding the Fourth Proportional to 643.10, 964.71 and 180.89

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Solution

The fourth proportional to 643.10, 964.71 and 180.89 is: 271.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.10 : 964.71 = 180.89 : x
  2. Step 2: Convert to fraction form
    643.10/964.71 = 180.89/x
  3. Step 3: Cross multiply
    643.10x = 964.71 × 180.89
  4. Step 4: Simplify right side
    643.10x = 174,503.23
  5. Step 5: Solve for x
    x = 174,503.23/643.10
  6. Step 6: Final answer
    x = 271.35

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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.