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Finding the Fourth Proportional to 753.17, 1,129.54 and 290.97

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Solution

The fourth proportional to 753.17, 1,129.54 and 290.97 is: 436.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.17 : 1,129.54 = 290.97 : x
  2. Step 2: Convert to fraction form
    753.17/1,129.54 = 290.97/x
  3. Step 3: Cross multiply
    753.17x = 1,129.54 × 290.97
  4. Step 4: Simplify right side
    753.17x = 328,662.25
  5. Step 5: Solve for x
    x = 328,662.25/753.17
  6. Step 6: Final answer
    x = 436.37

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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.