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Finding the Fourth Proportional to 1,039.86, 1,558.44 and 900.54

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Solution

The fourth proportional to 1,039.86, 1,558.44 and 900.54 is: 1,349.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,039.86 : 1,558.44 = 900.54 : x
  2. Step 2: Convert to fraction form
    1,039.86/1,558.44 = 900.54/x
  3. Step 3: Cross multiply
    1,039.86x = 1,558.44 × 900.54
  4. Step 4: Simplify right side
    1,039.86x = 1,403,437.56
  5. Step 5: Solve for x
    x = 1,403,437.56/1,039.86
  6. Step 6: Final answer
    x = 1,349.64

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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.