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Finding the Fourth Proportional to 1,718.76, 2,578.86 and 1,235.64

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Solution

The fourth proportional to 1,718.76, 2,578.86 and 1,235.64 is: 1,853.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,718.76 : 2,578.86 = 1,235.64 : x
  2. Step 2: Convert to fraction form
    1,718.76/2,578.86 = 1,235.64/x
  3. Step 3: Cross multiply
    1,718.76x = 2,578.86 × 1,235.64
  4. Step 4: Simplify right side
    1,718.76x = 3,186,542.57
  5. Step 5: Solve for x
    x = 3,186,542.57/1,718.76
  6. Step 6: Final answer
    x = 1,853.98

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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.