Home / 2,461.20-3,691.64-1,290.20

Finding the Fourth Proportional to 2,461.20, 3,691.64 and 1,290.20

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Solution

The fourth proportional to 2,461.20, 3,691.64 and 1,290.20 is: 1,935.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,461.20 : 3,691.64 = 1,290.20 : x
  2. Step 2: Convert to fraction form
    2,461.20/3,691.64 = 1,290.20/x
  3. Step 3: Cross multiply
    2,461.20x = 3,691.64 × 1,290.20
  4. Step 4: Simplify right side
    2,461.20x = 4,762,953.93
  5. Step 5: Solve for x
    x = 4,762,953.93/2,461.20
  6. Step 6: Final answer
    x = 1,935.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.