Home / 1,563.12-2,156.90-899.84

Finding the Fourth Proportional to 1,563.12, 2,156.90 and 899.84

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Solution

The fourth proportional to 1,563.12, 2,156.90 and 899.84 is: 1,241.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,563.12 : 2,156.90 = 899.84 : x
  2. Step 2: Convert to fraction form
    1,563.12/2,156.90 = 899.84/x
  3. Step 3: Cross multiply
    1,563.12x = 2,156.90 × 899.84
  4. Step 4: Simplify right side
    1,563.12x = 1,940,865.79
  5. Step 5: Solve for x
    x = 1,940,865.79/1,563.12
  6. Step 6: Final answer
    x = 1,241.66

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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.