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Finding the Fourth Proportional to 1,292.66, 1,938.98 and 368.22

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Solution

The fourth proportional to 1,292.66, 1,938.98 and 368.22 is: 552.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.66 : 1,938.98 = 368.22 : x
  2. Step 2: Convert to fraction form
    1,292.66/1,938.98 = 368.22/x
  3. Step 3: Cross multiply
    1,292.66x = 1,938.98 × 368.22
  4. Step 4: Simplify right side
    1,292.66x = 713,969.37
  5. Step 5: Solve for x
    x = 713,969.37/1,292.66
  6. Step 6: Final answer
    x = 552.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.