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Finding the Fourth Proportional to 1,172.16, 1,758.18 and 306.36

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Solution

The fourth proportional to 1,172.16, 1,758.18 and 306.36 is: 459.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,172.16 : 1,758.18 = 306.36 : x
  2. Step 2: Convert to fraction form
    1,172.16/1,758.18 = 306.36/x
  3. Step 3: Cross multiply
    1,172.16x = 1,758.18 × 306.36
  4. Step 4: Simplify right side
    1,172.16x = 538,636.02
  5. Step 5: Solve for x
    x = 538,636.02/1,172.16
  6. Step 6: Final answer
    x = 459.52

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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.