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Finding the Fourth Proportional to 1,587.14, 2,379.73 and 613.02

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Solution

The fourth proportional to 1,587.14, 2,379.73 and 613.02 is: 919.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.14 : 2,379.73 = 613.02 : x
  2. Step 2: Convert to fraction form
    1,587.14/2,379.73 = 613.02/x
  3. Step 3: Cross multiply
    1,587.14x = 2,379.73 × 613.02
  4. Step 4: Simplify right side
    1,587.14x = 1,458,817.24
  5. Step 5: Solve for x
    x = 1,458,817.24/1,587.14
  6. Step 6: Final answer
    x = 919.15

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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.