Home / 1,040.23-1,436.14-647.79

Finding the Fourth Proportional to 1,040.23, 1,436.14 and 647.79

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Solution

The fourth proportional to 1,040.23, 1,436.14 and 647.79 is: 894.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.23 : 1,436.14 = 647.79 : x
  2. Step 2: Convert to fraction form
    1,040.23/1,436.14 = 647.79/x
  3. Step 3: Cross multiply
    1,040.23x = 1,436.14 × 647.79
  4. Step 4: Simplify right side
    1,040.23x = 930,317.13
  5. Step 5: Solve for x
    x = 930,317.13/1,040.23
  6. Step 6: Final answer
    x = 894.34

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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.