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Finding the Fourth Proportional to 899.47, 1,240.80 and 605.03

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Solution

The fourth proportional to 899.47, 1,240.80 and 605.03 is: 834.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.47 : 1,240.80 = 605.03 : x
  2. Step 2: Convert to fraction form
    899.47/1,240.80 = 605.03/x
  3. Step 3: Cross multiply
    899.47x = 1,240.80 × 605.03
  4. Step 4: Simplify right side
    899.47x = 750,721.22
  5. Step 5: Solve for x
    x = 750,721.22/899.47
  6. Step 6: Final answer
    x = 834.63

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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.