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Finding the Fourth Proportional to 813.08, 1,218.74 and 351.07

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Solution

The fourth proportional to 813.08, 1,218.74 and 351.07 is: 526.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    813.08 : 1,218.74 = 351.07 : x
  2. Step 2: Convert to fraction form
    813.08/1,218.74 = 351.07/x
  3. Step 3: Cross multiply
    813.08x = 1,218.74 × 351.07
  4. Step 4: Simplify right side
    813.08x = 427,864.14
  5. Step 5: Solve for x
    x = 427,864.14/813.08
  6. Step 6: Final answer
    x = 526.23

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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.