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Finding the Fourth Proportional to 1,612.67, 2,419.25 and 688.22

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Solution

The fourth proportional to 1,612.67, 2,419.25 and 688.22 is: 1,032.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,612.67 : 2,419.25 = 688.22 : x
  2. Step 2: Convert to fraction form
    1,612.67/2,419.25 = 688.22/x
  3. Step 3: Cross multiply
    1,612.67x = 2,419.25 × 688.22
  4. Step 4: Simplify right side
    1,612.67x = 1,664,978.84
  5. Step 5: Solve for x
    x = 1,664,978.84/1,612.67
  6. Step 6: Final answer
    x = 1,032.44

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1.5x scale

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.