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Finding the Fourth Proportional to 1,040.42, 1,559.76 and 424.41

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Solution

The fourth proportional to 1,040.42, 1,559.76 and 424.41 is: 636.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.42 : 1,559.76 = 424.41 : x
  2. Step 2: Convert to fraction form
    1,040.42/1,559.76 = 424.41/x
  3. Step 3: Cross multiply
    1,040.42x = 1,559.76 × 424.41
  4. Step 4: Simplify right side
    1,040.42x = 661,977.74
  5. Step 5: Solve for x
    x = 661,977.74/1,040.42
  6. Step 6: Final answer
    x = 636.26

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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.