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Finding the Fourth Proportional to 1,613.93, 2,421.30 and 518.27

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Solution

The fourth proportional to 1,613.93, 2,421.30 and 518.27 is: 777.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,613.93 : 2,421.30 = 518.27 : x
  2. Step 2: Convert to fraction form
    1,613.93/2,421.30 = 518.27/x
  3. Step 3: Cross multiply
    1,613.93x = 2,421.30 × 518.27
  4. Step 4: Simplify right side
    1,613.93x = 1,254,887.15
  5. Step 5: Solve for x
    x = 1,254,887.15/1,613.93
  6. Step 6: Final answer
    x = 777.54

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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.