Home / 1,536.20-2,120.29-976.57

Finding the Fourth Proportional to 1,536.20, 2,120.29 and 976.57

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Solution

The fourth proportional to 1,536.20, 2,120.29 and 976.57 is: 1,347.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,536.20 : 2,120.29 = 976.57 : x
  2. Step 2: Convert to fraction form
    1,536.20/2,120.29 = 976.57/x
  3. Step 3: Cross multiply
    1,536.20x = 2,120.29 × 976.57
  4. Step 4: Simplify right side
    1,536.20x = 2,070,603.86
  5. Step 5: Solve for x
    x = 2,070,603.86/1,536.20
  6. Step 6: Final answer
    x = 1,347.87

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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.