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Finding the Fourth Proportional to 1,338.15, 2,006.56 and 607.21

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Solution

The fourth proportional to 1,338.15, 2,006.56 and 607.21 is: 910.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,338.15 : 2,006.56 = 607.21 : x
  2. Step 2: Convert to fraction form
    1,338.15/2,006.56 = 607.21/x
  3. Step 3: Cross multiply
    1,338.15x = 2,006.56 × 607.21
  4. Step 4: Simplify right side
    1,338.15x = 1,218,403.30
  5. Step 5: Solve for x
    x = 1,218,403.30/1,338.15
  6. Step 6: Final answer
    x = 910.51

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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.