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Finding the Fourth Proportional to 1,668.99, 2,502.80 and 498.58

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Solution

The fourth proportional to 1,668.99, 2,502.80 and 498.58 is: 747.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,668.99 : 2,502.80 = 498.58 : x
  2. Step 2: Convert to fraction form
    1,668.99/2,502.80 = 498.58/x
  3. Step 3: Cross multiply
    1,668.99x = 2,502.80 × 498.58
  4. Step 4: Simplify right side
    1,668.99x = 1,247,839.14
  5. Step 5: Solve for x
    x = 1,247,839.14/1,668.99
  6. Step 6: Final answer
    x = 747.66

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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.