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Finding the Fourth Proportional to 591.12, 891.18 and 549.36

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Solution

The fourth proportional to 591.12, 891.18 and 549.36 is: 828.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.12 : 891.18 = 549.36 : x
  2. Step 2: Convert to fraction form
    591.12/891.18 = 549.36/x
  3. Step 3: Cross multiply
    591.12x = 891.18 × 549.36
  4. Step 4: Simplify right side
    591.12x = 489,578.64
  5. Step 5: Solve for x
    x = 489,578.64/591.12
  6. Step 6: Final answer
    x = 828.22

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.