Home / 1,291.24-1,946.59-1,207.72

Finding the Fourth Proportional to 1,291.24, 1,946.59 and 1,207.72

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Solution

The fourth proportional to 1,291.24, 1,946.59 and 1,207.72 is: 1,820.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291.24 : 1,946.59 = 1,207.72 : x
  2. Step 2: Convert to fraction form
    1,291.24/1,946.59 = 1,207.72/x
  3. Step 3: Cross multiply
    1,291.24x = 1,946.59 × 1,207.72
  4. Step 4: Simplify right side
    1,291.24x = 2,350,935.67
  5. Step 5: Solve for x
    x = 2,350,935.67/1,291.24
  6. Step 6: Final answer
    x = 1,820.68

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.