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Finding the Fourth Proportional to 508.51, 762.82 and 138.32

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Solution

The fourth proportional to 508.51, 762.82 and 138.32 is: 207.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.51 : 762.82 = 138.32 : x
  2. Step 2: Convert to fraction form
    508.51/762.82 = 138.32/x
  3. Step 3: Cross multiply
    508.51x = 762.82 × 138.32
  4. Step 4: Simplify right side
    508.51x = 105,516.77
  5. Step 5: Solve for x
    x = 105,516.77/508.51
  6. Step 6: Final answer
    x = 207.50

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Double scale
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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.