Home / 1,563.09-2,156.59-899.70

Finding the Fourth Proportional to 1,563.09, 2,156.59 and 899.70

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Solution

The fourth proportional to 1,563.09, 2,156.59 and 899.70 is: 1,241.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,563.09 : 2,156.59 = 899.70 : x
  2. Step 2: Convert to fraction form
    1,563.09/2,156.59 = 899.70/x
  3. Step 3: Cross multiply
    1,563.09x = 2,156.59 × 899.70
  4. Step 4: Simplify right side
    1,563.09x = 1,940,284.02
  5. Step 5: Solve for x
    x = 1,940,284.02/1,563.09
  6. Step 6: Final answer
    x = 1,241.31

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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.