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Finding the Fourth Proportional to 1,613.00, 2,420.31 and 735.40

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Solution

The fourth proportional to 1,613.00, 2,420.31 and 735.40 is: 1,103.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,613.00 : 2,420.31 = 735.40 : x
  2. Step 2: Convert to fraction form
    1,613.00/2,420.31 = 735.40/x
  3. Step 3: Cross multiply
    1,613.00x = 2,420.31 × 735.40
  4. Step 4: Simplify right side
    1,613.00x = 1,779,895.97
  5. Step 5: Solve for x
    x = 1,779,895.97/1,613.00
  6. Step 6: Final answer
    x = 1,103.47

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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.