Home / 1,639.28-2,262.76-976.34

Finding the Fourth Proportional to 1,639.28, 2,262.76 and 976.34

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Solution

The fourth proportional to 1,639.28, 2,262.76 and 976.34 is: 1,347.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.28 : 2,262.76 = 976.34 : x
  2. Step 2: Convert to fraction form
    1,639.28/2,262.76 = 976.34/x
  3. Step 3: Cross multiply
    1,639.28x = 2,262.76 × 976.34
  4. Step 4: Simplify right side
    1,639.28x = 2,209,223.10
  5. Step 5: Solve for x
    x = 2,209,223.10/1,639.28
  6. Step 6: Final answer
    x = 1,347.68

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1.5x scale

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.