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Finding the Fourth Proportional to 1,172.17, 1,758.03 and 555.31

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Solution

The fourth proportional to 1,172.17, 1,758.03 and 555.31 is: 832.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,172.17 : 1,758.03 = 555.31 : x
  2. Step 2: Convert to fraction form
    1,172.17/1,758.03 = 555.31/x
  3. Step 3: Cross multiply
    1,172.17x = 1,758.03 × 555.31
  4. Step 4: Simplify right side
    1,172.17x = 976,251.64
  5. Step 5: Solve for x
    x = 976,251.64/1,172.17
  6. Step 6: Final answer
    x = 832.86

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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.