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Finding the Fourth Proportional to 846.90, 1,268.91 and 359.28

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Solution

The fourth proportional to 846.90, 1,268.91 and 359.28 is: 538.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.90 : 1,268.91 = 359.28 : x
  2. Step 2: Convert to fraction form
    846.90/1,268.91 = 359.28/x
  3. Step 3: Cross multiply
    846.90x = 1,268.91 × 359.28
  4. Step 4: Simplify right side
    846.90x = 455,893.98
  5. Step 5: Solve for x
    x = 455,893.98/846.90
  6. Step 6: Final answer
    x = 538.31

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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.