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Finding the Fourth Proportional to 899.88, 1,242.26 and 605.36

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Solution

The fourth proportional to 899.88, 1,242.26 and 605.36 is: 835.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.88 : 1,242.26 = 605.36 : x
  2. Step 2: Convert to fraction form
    899.88/1,242.26 = 605.36/x
  3. Step 3: Cross multiply
    899.88x = 1,242.26 × 605.36
  4. Step 4: Simplify right side
    899.88x = 752,014.51
  5. Step 5: Solve for x
    x = 752,014.51/899.88
  6. Step 6: Final answer
    x = 835.68

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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.