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Finding the Fourth Proportional to 1,491.46, 2,237.58 and 517.64

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Solution

The fourth proportional to 1,491.46, 2,237.58 and 517.64 is: 776.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,491.46 : 2,237.58 = 517.64 : x
  2. Step 2: Convert to fraction form
    1,491.46/2,237.58 = 517.64/x
  3. Step 3: Cross multiply
    1,491.46x = 2,237.58 × 517.64
  4. Step 4: Simplify right side
    1,491.46x = 1,158,260.91
  5. Step 5: Solve for x
    x = 1,158,260.91/1,491.46
  6. Step 6: Final answer
    x = 776.60

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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.