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Finding the Fourth Proportional to 899.09, 1,237.84 and 699.68

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Solution

The fourth proportional to 899.09, 1,237.84 and 699.68 is: 963.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.09 : 1,237.84 = 699.68 : x
  2. Step 2: Convert to fraction form
    899.09/1,237.84 = 699.68/x
  3. Step 3: Cross multiply
    899.09x = 1,237.84 × 699.68
  4. Step 4: Simplify right side
    899.09x = 866,091.89
  5. Step 5: Solve for x
    x = 866,091.89/899.09
  6. Step 6: Final answer
    x = 963.30

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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.