Home / 1,314.08-1,961.64-1,117.76

Finding the Fourth Proportional to 1,314.08, 1,961.64 and 1,117.76

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Solution

The fourth proportional to 1,314.08, 1,961.64 and 1,117.76 is: 1,668.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,314.08 : 1,961.64 = 1,117.76 : x
  2. Step 2: Convert to fraction form
    1,314.08/1,961.64 = 1,117.76/x
  3. Step 3: Cross multiply
    1,314.08x = 1,961.64 × 1,117.76
  4. Step 4: Simplify right side
    1,314.08x = 2,192,642.78
  5. Step 5: Solve for x
    x = 2,192,642.78/1,314.08
  6. Step 6: Final answer
    x = 1,668.58

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.