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Finding the Fourth Proportional to 899.64, 1,242.07 and 734.24

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Solution

The fourth proportional to 899.64, 1,242.07 and 734.24 is: 1,013.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.64 : 1,242.07 = 734.24 : x
  2. Step 2: Convert to fraction form
    899.64/1,242.07 = 734.24/x
  3. Step 3: Cross multiply
    899.64x = 1,242.07 × 734.24
  4. Step 4: Simplify right side
    899.64x = 911,983.05
  5. Step 5: Solve for x
    x = 911,983.05/899.64
  6. Step 6: Final answer
    x = 1,013.72

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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.