Home / 1,607.30-2,218.12-899.12

Finding the Fourth Proportional to 1,607.30, 2,218.12 and 899.12

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Solution

The fourth proportional to 1,607.30, 2,218.12 and 899.12 is: 1,240.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,607.30 : 2,218.12 = 899.12 : x
  2. Step 2: Convert to fraction form
    1,607.30/2,218.12 = 899.12/x
  3. Step 3: Cross multiply
    1,607.30x = 2,218.12 × 899.12
  4. Step 4: Simplify right side
    1,607.30x = 1,994,356.05
  5. Step 5: Solve for x
    x = 1,994,356.05/1,607.30
  6. Step 6: Final answer
    x = 1,240.81

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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.