Home / 1,908.28-2,636.36-1,631.40

Finding the Fourth Proportional to 1,908.28, 2,636.36 and 1,631.40

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Solution

The fourth proportional to 1,908.28, 2,636.36 and 1,631.40 is: 2,253.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,908.28 : 2,636.36 = 1,631.40 : x
  2. Step 2: Convert to fraction form
    1,908.28/2,636.36 = 1,631.40/x
  3. Step 3: Cross multiply
    1,908.28x = 2,636.36 × 1,631.40
  4. Step 4: Simplify right side
    1,908.28x = 4,300,957.70
  5. Step 5: Solve for x
    x = 4,300,957.70/1,908.28
  6. Step 6: Final answer
    x = 2,253.84

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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.