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Finding the Fourth Proportional to 1,172.77, 1,758.92 and 339.93

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Solution

The fourth proportional to 1,172.77, 1,758.92 and 339.93 is: 509.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,172.77 : 1,758.92 = 339.93 : x
  2. Step 2: Convert to fraction form
    1,172.77/1,758.92 = 339.93/x
  3. Step 3: Cross multiply
    1,172.77x = 1,758.92 × 339.93
  4. Step 4: Simplify right side
    1,172.77x = 597,899.18
  5. Step 5: Solve for x
    x = 597,899.18/1,172.77
  6. Step 6: Final answer
    x = 509.82

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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.