Home / 1,638.08-2,260.39-974.81

Finding the Fourth Proportional to 1,638.08, 2,260.39 and 974.81

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Solution

The fourth proportional to 1,638.08, 2,260.39 and 974.81 is: 1,345.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.08 : 2,260.39 = 974.81 : x
  2. Step 2: Convert to fraction form
    1,638.08/2,260.39 = 974.81/x
  3. Step 3: Cross multiply
    1,638.08x = 2,260.39 × 974.81
  4. Step 4: Simplify right side
    1,638.08x = 2,203,439.45
  5. Step 5: Solve for x
    x = 2,203,439.45/1,638.08
  6. Step 6: Final answer
    x = 1,345.13

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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.