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Finding the Fourth Proportional to 1,040.99, 1,558.90 and 628.88

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Solution

The fourth proportional to 1,040.99, 1,558.90 and 628.88 is: 941.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.99 : 1,558.90 = 628.88 : x
  2. Step 2: Convert to fraction form
    1,040.99/1,558.90 = 628.88/x
  3. Step 3: Cross multiply
    1,040.99x = 1,558.90 × 628.88
  4. Step 4: Simplify right side
    1,040.99x = 980,365.72
  5. Step 5: Solve for x
    x = 980,365.72/1,040.99
  6. Step 6: Final answer
    x = 941.76

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1.5x scale

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.