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Finding the Fourth Proportional to 1,718.80, 2,578.20 and 1,651.60

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Solution

The fourth proportional to 1,718.80, 2,578.20 and 1,651.60 is: 2,477.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,718.80 : 2,578.20 = 1,651.60 : x
  2. Step 2: Convert to fraction form
    1,718.80/2,578.20 = 1,651.60/x
  3. Step 3: Cross multiply
    1,718.80x = 2,578.20 × 1,651.60
  4. Step 4: Simplify right side
    1,718.80x = 4,258,155.12
  5. Step 5: Solve for x
    x = 4,258,155.12/1,718.80
  6. Step 6: Final answer
    x = 2,477.40

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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.