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Finding the Fourth Proportional to 1,192.85, 1,646.87 and 751.40

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Solution

The fourth proportional to 1,192.85, 1,646.87 and 751.40 is: 1,037.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,192.85 : 1,646.87 = 751.40 : x
  2. Step 2: Convert to fraction form
    1,192.85/1,646.87 = 751.40/x
  3. Step 3: Cross multiply
    1,192.85x = 1,646.87 × 751.40
  4. Step 4: Simplify right side
    1,192.85x = 1,237,458.12
  5. Step 5: Solve for x
    x = 1,237,458.12/1,192.85
  6. Step 6: Final answer
    x = 1,037.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.