Home / 1,457.55-2,187.13-688.03

Finding the Fourth Proportional to 1,457.55, 2,187.13 and 688.03

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Solution

The fourth proportional to 1,457.55, 2,187.13 and 688.03 is: 1,032.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,457.55 : 2,187.13 = 688.03 : x
  2. Step 2: Convert to fraction form
    1,457.55/2,187.13 = 688.03/x
  3. Step 3: Cross multiply
    1,457.55x = 2,187.13 × 688.03
  4. Step 4: Simplify right side
    1,457.55x = 1,504,807.61
  5. Step 5: Solve for x
    x = 1,504,807.61/1,457.55
  6. Step 6: Final answer
    x = 1,032.42

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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.