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Finding the Fourth Proportional to 1,146.76, 1,720.55 and 488.80

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Solution

The fourth proportional to 1,146.76, 1,720.55 and 488.80 is: 733.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,146.76 : 1,720.55 = 488.80 : x
  2. Step 2: Convert to fraction form
    1,146.76/1,720.55 = 488.80/x
  3. Step 3: Cross multiply
    1,146.76x = 1,720.55 × 488.80
  4. Step 4: Simplify right side
    1,146.76x = 841,004.84
  5. Step 5: Solve for x
    x = 841,004.84/1,146.76
  6. Step 6: Final answer
    x = 733.37

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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.