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Finding the Fourth Proportional to 1,668.70, 2,502.78 and 498.70

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Solution

The fourth proportional to 1,668.70, 2,502.78 and 498.70 is: 747.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,668.70 : 2,502.78 = 498.70 : x
  2. Step 2: Convert to fraction form
    1,668.70/2,502.78 = 498.70/x
  3. Step 3: Cross multiply
    1,668.70x = 2,502.78 × 498.70
  4. Step 4: Simplify right side
    1,668.70x = 1,248,136.39
  5. Step 5: Solve for x
    x = 1,248,136.39/1,668.70
  6. Step 6: Final answer
    x = 747.97

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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.