Home / 1,639.56-2,262.34-976.40

Finding the Fourth Proportional to 1,639.56, 2,262.34 and 976.40

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Solution

The fourth proportional to 1,639.56, 2,262.34 and 976.40 is: 1,347.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.56 : 2,262.34 = 976.40 : x
  2. Step 2: Convert to fraction form
    1,639.56/2,262.34 = 976.40/x
  3. Step 3: Cross multiply
    1,639.56x = 2,262.34 × 976.40
  4. Step 4: Simplify right side
    1,639.56x = 2,208,948.78
  5. Step 5: Solve for x
    x = 2,208,948.78/1,639.56
  6. Step 6: Final answer
    x = 1,347.28

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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.