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Finding the Fourth Proportional to 1,424.67, 1,965.51 and 899.79

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Solution

The fourth proportional to 1,424.67, 1,965.51 and 899.79 is: 1,241.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424.67 : 1,965.51 = 899.79 : x
  2. Step 2: Convert to fraction form
    1,424.67/1,965.51 = 899.79/x
  3. Step 3: Cross multiply
    1,424.67x = 1,965.51 × 899.79
  4. Step 4: Simplify right side
    1,424.67x = 1,768,546.24
  5. Step 5: Solve for x
    x = 1,768,546.24/1,424.67
  6. Step 6: Final answer
    x = 1,241.37

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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.