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Finding the Fourth Proportional to 1,325.55, 1,988.37 and 492.83

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Solution

The fourth proportional to 1,325.55, 1,988.37 and 492.83 is: 739.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.55 : 1,988.37 = 492.83 : x
  2. Step 2: Convert to fraction form
    1,325.55/1,988.37 = 492.83/x
  3. Step 3: Cross multiply
    1,325.55x = 1,988.37 × 492.83
  4. Step 4: Simplify right side
    1,325.55x = 979,928.39
  5. Step 5: Solve for x
    x = 979,928.39/1,325.55
  6. Step 6: Final answer
    x = 739.26

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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.