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Finding the Fourth Proportional to 1,481.59, 2,223.75 and 751.67

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Solution

The fourth proportional to 1,481.59, 2,223.75 and 751.67 is: 1,128.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,481.59 : 2,223.75 = 751.67 : x
  2. Step 2: Convert to fraction form
    1,481.59/2,223.75 = 751.67/x
  3. Step 3: Cross multiply
    1,481.59x = 2,223.75 × 751.67
  4. Step 4: Simplify right side
    1,481.59x = 1,671,526.16
  5. Step 5: Solve for x
    x = 1,671,526.16/1,481.59
  6. Step 6: Final answer
    x = 1,128.20

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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.