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Finding the Fourth Proportional to 841.16, 1,161.19 and 505.22

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Solution

The fourth proportional to 841.16, 1,161.19 and 505.22 is: 697.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.16 : 1,161.19 = 505.22 : x
  2. Step 2: Convert to fraction form
    841.16/1,161.19 = 505.22/x
  3. Step 3: Cross multiply
    841.16x = 1,161.19 × 505.22
  4. Step 4: Simplify right side
    841.16x = 586,662.66
  5. Step 5: Solve for x
    x = 586,662.66/841.16
  6. Step 6: Final answer
    x = 697.45

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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.