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Finding the Fourth Proportional to 1,175.10, 1,762.71 and 309.39

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Solution

The fourth proportional to 1,175.10, 1,762.71 and 309.39 is: 464.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,175.10 : 1,762.71 = 309.39 : x
  2. Step 2: Convert to fraction form
    1,175.10/1,762.71 = 309.39/x
  3. Step 3: Cross multiply
    1,175.10x = 1,762.71 × 309.39
  4. Step 4: Simplify right side
    1,175.10x = 545,364.85
  5. Step 5: Solve for x
    x = 545,364.85/1,175.10
  6. Step 6: Final answer
    x = 464.10

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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.