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Finding the Fourth Proportional to 665.36, 992.18 and 619.19

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Solution

The fourth proportional to 665.36, 992.18 and 619.19 is: 923.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.36 : 992.18 = 619.19 : x
  2. Step 2: Convert to fraction form
    665.36/992.18 = 619.19/x
  3. Step 3: Cross multiply
    665.36x = 992.18 × 619.19
  4. Step 4: Simplify right side
    665.36x = 614,347.93
  5. Step 5: Solve for x
    x = 614,347.93/665.36
  6. Step 6: Final answer
    x = 923.33

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.