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Finding the Fourth Proportional to 925.51, 1,386.68 and 808.67

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Solution

The fourth proportional to 925.51, 1,386.68 and 808.67 is: 1,211.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.51 : 1,386.68 = 808.67 : x
  2. Step 2: Convert to fraction form
    925.51/1,386.68 = 808.67/x
  3. Step 3: Cross multiply
    925.51x = 1,386.68 × 808.67
  4. Step 4: Simplify right side
    925.51x = 1,121,359.58
  5. Step 5: Solve for x
    x = 1,121,359.58/925.51
  6. Step 6: Final answer
    x = 1,211.62

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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.