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Finding the Fourth Proportional to 1,147.81, 1,721.80 and 498.59

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Solution

The fourth proportional to 1,147.81, 1,721.80 and 498.59 is: 747.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.81 : 1,721.80 = 498.59 : x
  2. Step 2: Convert to fraction form
    1,147.81/1,721.80 = 498.59/x
  3. Step 3: Cross multiply
    1,147.81x = 1,721.80 × 498.59
  4. Step 4: Simplify right side
    1,147.81x = 858,477.19
  5. Step 5: Solve for x
    x = 858,477.19/1,147.81
  6. Step 6: Final answer
    x = 747.93

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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.