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Finding the Fourth Proportional to 736.36, 1,015.40 and 549.55

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Solution

The fourth proportional to 736.36, 1,015.40 and 549.55 is: 757.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    736.36 : 1,015.40 = 549.55 : x
  2. Step 2: Convert to fraction form
    736.36/1,015.40 = 549.55/x
  3. Step 3: Cross multiply
    736.36x = 1,015.40 × 549.55
  4. Step 4: Simplify right side
    736.36x = 558,013.07
  5. Step 5: Solve for x
    x = 558,013.07/736.36
  6. Step 6: Final answer
    x = 757.80

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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.