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Finding the Fourth Proportional to 945.31, 1,418.17 and 368.19

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Solution

The fourth proportional to 945.31, 1,418.17 and 368.19 is: 552.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.31 : 1,418.17 = 368.19 : x
  2. Step 2: Convert to fraction form
    945.31/1,418.17 = 368.19/x
  3. Step 3: Cross multiply
    945.31x = 1,418.17 × 368.19
  4. Step 4: Simplify right side
    945.31x = 522,156.01
  5. Step 5: Solve for x
    x = 522,156.01/945.31
  6. Step 6: Final answer
    x = 552.36

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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.