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Finding the Fourth Proportional to 899.90, 1,242 and 652.34

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Solution

The fourth proportional to 899.90, 1,242 and 652.34 is: 900.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.90 : 1,242 = 652.34 : x
  2. Step 2: Convert to fraction form
    899.90/1,242 = 652.34/x
  3. Step 3: Cross multiply
    899.90x = 1,242 × 652.34
  4. Step 4: Simplify right side
    899.90x = 810,206.28
  5. Step 5: Solve for x
    x = 810,206.28/899.90
  6. Step 6: Final answer
    x = 900.33

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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.