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Finding the Fourth Proportional to 841.26, 1,160.88 and 487.19

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Solution

The fourth proportional to 841.26, 1,160.88 and 487.19 is: 672.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.26 : 1,160.88 = 487.19 : x
  2. Step 2: Convert to fraction form
    841.26/1,160.88 = 487.19/x
  3. Step 3: Cross multiply
    841.26x = 1,160.88 × 487.19
  4. Step 4: Simplify right side
    841.26x = 565,563.32
  5. Step 5: Solve for x
    x = 565,563.32/841.26
  6. Step 6: Final answer
    x = 672.28

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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.