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Finding the Fourth Proportional to 1,544.69, 2,131.59 and 915.28

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Solution

The fourth proportional to 1,544.69, 2,131.59 and 915.28 is: 1,263.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,544.69 : 2,131.59 = 915.28 : x
  2. Step 2: Convert to fraction form
    1,544.69/2,131.59 = 915.28/x
  3. Step 3: Cross multiply
    1,544.69x = 2,131.59 × 915.28
  4. Step 4: Simplify right side
    1,544.69x = 1,950,997.51
  5. Step 5: Solve for x
    x = 1,950,997.51/1,544.69
  6. Step 6: Final answer
    x = 1,263.03

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.