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Finding the Fourth Proportional to 1,040.91, 1,437.12 and 648.51

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Solution

The fourth proportional to 1,040.91, 1,437.12 and 648.51 is: 895.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.91 : 1,437.12 = 648.51 : x
  2. Step 2: Convert to fraction form
    1,040.91/1,437.12 = 648.51/x
  3. Step 3: Cross multiply
    1,040.91x = 1,437.12 × 648.51
  4. Step 4: Simplify right side
    1,040.91x = 931,986.69
  5. Step 5: Solve for x
    x = 931,986.69/1,040.91
  6. Step 6: Final answer
    x = 895.36

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Why These Related Problems?

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