Home / 1,416.64-2,122.23-686.73

Finding the Fourth Proportional to 1,416.64, 2,122.23 and 686.73

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Solution

The fourth proportional to 1,416.64, 2,122.23 and 686.73 is: 1,028.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,416.64 : 2,122.23 = 686.73 : x
  2. Step 2: Convert to fraction form
    1,416.64/2,122.23 = 686.73/x
  3. Step 3: Cross multiply
    1,416.64x = 2,122.23 × 686.73
  4. Step 4: Simplify right side
    1,416.64x = 1,457,391.81
  5. Step 5: Solve for x
    x = 1,457,391.81/1,416.64
  6. Step 6: Final answer
    x = 1,028.77

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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.