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Finding the Fourth Proportional to 808.68, 1,211.74 and 483.64

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Solution

The fourth proportional to 808.68, 1,211.74 and 483.64 is: 724.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.68 : 1,211.74 = 483.64 : x
  2. Step 2: Convert to fraction form
    808.68/1,211.74 = 483.64/x
  3. Step 3: Cross multiply
    808.68x = 1,211.74 × 483.64
  4. Step 4: Simplify right side
    808.68x = 586,045.93
  5. Step 5: Solve for x
    x = 586,045.93/808.68
  6. Step 6: Final answer
    x = 724.69

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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.