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Finding the Fourth Proportional to 1,179, 1,627.20 and 899.64

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Solution

The fourth proportional to 1,179, 1,627.20 and 899.64 is: 1,241.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,179 : 1,627.20 = 899.64 : x
  2. Step 2: Convert to fraction form
    1,179/1,627.20 = 899.64/x
  3. Step 3: Cross multiply
    1,179x = 1,627.20 × 899.64
  4. Step 4: Simplify right side
    1,179x = 1,463,894.21
  5. Step 5: Solve for x
    x = 1,463,894.21/1,179
  6. Step 6: Final answer
    x = 1,241.64

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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.