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Finding the Fourth Proportional to 1,491.47, 2,237.96 and 1,128.49

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Solution

The fourth proportional to 1,491.47, 2,237.96 and 1,128.49 is: 1,693.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,491.47 : 2,237.96 = 1,128.49 : x
  2. Step 2: Convert to fraction form
    1,491.47/2,237.96 = 1,128.49/x
  3. Step 3: Cross multiply
    1,491.47x = 2,237.96 × 1,128.49
  4. Step 4: Simplify right side
    1,491.47x = 2,525,515.48
  5. Step 5: Solve for x
    x = 2,525,515.48/1,491.47
  6. Step 6: Final answer
    x = 1,693.31

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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.