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Finding the Fourth Proportional to 1,613.41, 2,420.11 and 459.16

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Solution

The fourth proportional to 1,613.41, 2,420.11 and 459.16 is: 688.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,613.41 : 2,420.11 = 459.16 : x
  2. Step 2: Convert to fraction form
    1,613.41/2,420.11 = 459.16/x
  3. Step 3: Cross multiply
    1,613.41x = 2,420.11 × 459.16
  4. Step 4: Simplify right side
    1,613.41x = 1,111,217.71
  5. Step 5: Solve for x
    x = 1,111,217.71/1,613.41
  6. Step 6: Final answer
    x = 688.74

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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.