Home / 1,607.21-2,217.74-899.11

Finding the Fourth Proportional to 1,607.21, 2,217.74 and 899.11

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Solution

The fourth proportional to 1,607.21, 2,217.74 and 899.11 is: 1,240.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,607.21 : 2,217.74 = 899.11 : x
  2. Step 2: Convert to fraction form
    1,607.21/2,217.74 = 899.11/x
  3. Step 3: Cross multiply
    1,607.21x = 2,217.74 × 899.11
  4. Step 4: Simplify right side
    1,607.21x = 1,993,992.21
  5. Step 5: Solve for x
    x = 1,993,992.21/1,607.21
  6. Step 6: Final answer
    x = 1,240.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.