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Finding the Fourth Proportional to 1,028.48, 1,543.36 and 900.48

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Solution

The fourth proportional to 1,028.48, 1,543.36 and 900.48 is: 1,351.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028.48 : 1,543.36 = 900.48 : x
  2. Step 2: Convert to fraction form
    1,028.48/1,543.36 = 900.48/x
  3. Step 3: Cross multiply
    1,028.48x = 1,543.36 × 900.48
  4. Step 4: Simplify right side
    1,028.48x = 1,389,764.81
  5. Step 5: Solve for x
    x = 1,389,764.81/1,028.48
  6. Step 6: Final answer
    x = 1,351.28

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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.