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Finding the Fourth Proportional to 1,341.12, 1,851 and 751.92

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Solution

The fourth proportional to 1,341.12, 1,851 and 751.92 is: 1,037.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,341.12 : 1,851 = 751.92 : x
  2. Step 2: Convert to fraction form
    1,341.12/1,851 = 751.92/x
  3. Step 3: Cross multiply
    1,341.12x = 1,851 × 751.92
  4. Step 4: Simplify right side
    1,341.12x = 1,391,803.92
  5. Step 5: Solve for x
    x = 1,391,803.92/1,341.12
  6. Step 6: Final answer
    x = 1,037.79

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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.