Home / 1,562.79-2,156.66-899.78

Finding the Fourth Proportional to 1,562.79, 2,156.66 and 899.78

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Solution

The fourth proportional to 1,562.79, 2,156.66 and 899.78 is: 1,241.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,562.79 : 2,156.66 = 899.78 : x
  2. Step 2: Convert to fraction form
    1,562.79/2,156.66 = 899.78/x
  3. Step 3: Cross multiply
    1,562.79x = 2,156.66 × 899.78
  4. Step 4: Simplify right side
    1,562.79x = 1,940,504.25
  5. Step 5: Solve for x
    x = 1,940,504.25/1,562.79
  6. Step 6: Final answer
    x = 1,241.69

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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.