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Finding the Fourth Proportional to 1,660.90, 2,491.74 and 506.64

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Solution

The fourth proportional to 1,660.90, 2,491.74 and 506.64 is: 760.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,660.90 : 2,491.74 = 506.64 : x
  2. Step 2: Convert to fraction form
    1,660.90/2,491.74 = 506.64/x
  3. Step 3: Cross multiply
    1,660.90x = 2,491.74 × 506.64
  4. Step 4: Simplify right side
    1,660.90x = 1,262,415.15
  5. Step 5: Solve for x
    x = 1,262,415.15/1,660.90
  6. Step 6: Final answer
    x = 760.08

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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.