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Finding the Fourth Proportional to 639.34, 959.01 and 177.18

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Solution

The fourth proportional to 639.34, 959.01 and 177.18 is: 265.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.34 : 959.01 = 177.18 : x
  2. Step 2: Convert to fraction form
    639.34/959.01 = 177.18/x
  3. Step 3: Cross multiply
    639.34x = 959.01 × 177.18
  4. Step 4: Simplify right side
    639.34x = 169,916.51
  5. Step 5: Solve for x
    x = 169,916.51/639.34
  6. Step 6: Final answer
    x = 265.77

Related Problems

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Double scale
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Similar ratio
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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.