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Finding the Fourth Proportional to 1,490.55, 2,236.08 and 516.39

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Solution

The fourth proportional to 1,490.55, 2,236.08 and 516.39 is: 774.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,490.55 : 2,236.08 = 516.39 : x
  2. Step 2: Convert to fraction form
    1,490.55/2,236.08 = 516.39/x
  3. Step 3: Cross multiply
    1,490.55x = 2,236.08 × 516.39
  4. Step 4: Simplify right side
    1,490.55x = 1,154,689.35
  5. Step 5: Solve for x
    x = 1,154,689.35/1,490.55
  6. Step 6: Final answer
    x = 774.67

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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.