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Finding the Fourth Proportional to 993.07, 1,370.28 and 550.90

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Solution

The fourth proportional to 993.07, 1,370.28 and 550.90 is: 760.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.07 : 1,370.28 = 550.90 : x
  2. Step 2: Convert to fraction form
    993.07/1,370.28 = 550.90/x
  3. Step 3: Cross multiply
    993.07x = 1,370.28 × 550.90
  4. Step 4: Simplify right side
    993.07x = 754,887.25
  5. Step 5: Solve for x
    x = 754,887.25/993.07
  6. Step 6: Final answer
    x = 760.16

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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.