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Finding the Fourth Proportional to 899.64, 1,348.83 and 412.43

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Solution

The fourth proportional to 899.64, 1,348.83 and 412.43 is: 618.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.64 : 1,348.83 = 412.43 : x
  2. Step 2: Convert to fraction form
    899.64/1,348.83 = 412.43/x
  3. Step 3: Cross multiply
    899.64x = 1,348.83 × 412.43
  4. Step 4: Simplify right side
    899.64x = 556,291.21
  5. Step 5: Solve for x
    x = 556,291.21/899.64
  6. Step 6: Final answer
    x = 618.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.