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Finding the Fourth Proportional to 1,790.72, 2,684.66 and 751.53

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Solution

The fourth proportional to 1,790.72, 2,684.66 and 751.53 is: 1,126.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,790.72 : 2,684.66 = 751.53 : x
  2. Step 2: Convert to fraction form
    1,790.72/2,684.66 = 751.53/x
  3. Step 3: Cross multiply
    1,790.72x = 2,684.66 × 751.53
  4. Step 4: Simplify right side
    1,790.72x = 2,017,598.77
  5. Step 5: Solve for x
    x = 2,017,598.77/1,790.72
  6. Step 6: Final answer
    x = 1,126.70

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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.