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Finding the Fourth Proportional to 1,457.04, 2,181.68 and 993.68

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Solution

The fourth proportional to 1,457.04, 2,181.68 and 993.68 is: 1,487.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,457.04 : 2,181.68 = 993.68 : x
  2. Step 2: Convert to fraction form
    1,457.04/2,181.68 = 993.68/x
  3. Step 3: Cross multiply
    1,457.04x = 2,181.68 × 993.68
  4. Step 4: Simplify right side
    1,457.04x = 2,167,891.78
  5. Step 5: Solve for x
    x = 2,167,891.78/1,457.04
  6. Step 6: Final answer
    x = 1,487.87

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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.