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Finding the Fourth Proportional to 1,608.81, 2,411.58 and 621.36

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Solution

The fourth proportional to 1,608.81, 2,411.58 and 621.36 is: 931.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,608.81 : 2,411.58 = 621.36 : x
  2. Step 2: Convert to fraction form
    1,608.81/2,411.58 = 621.36/x
  3. Step 3: Cross multiply
    1,608.81x = 2,411.58 × 621.36
  4. Step 4: Simplify right side
    1,608.81x = 1,498,459.35
  5. Step 5: Solve for x
    x = 1,498,459.35/1,608.81
  6. Step 6: Final answer
    x = 931.41

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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.