Home / 1,572.09-2,169.75-899.88

Finding the Fourth Proportional to 1,572.09, 2,169.75 and 899.88

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Solution

The fourth proportional to 1,572.09, 2,169.75 and 899.88 is: 1,241.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,572.09 : 2,169.75 = 899.88 : x
  2. Step 2: Convert to fraction form
    1,572.09/2,169.75 = 899.88/x
  3. Step 3: Cross multiply
    1,572.09x = 2,169.75 × 899.88
  4. Step 4: Simplify right side
    1,572.09x = 1,952,514.63
  5. Step 5: Solve for x
    x = 1,952,514.63/1,572.09
  6. Step 6: Final answer
    x = 1,241.99

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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.