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Finding the Fourth Proportional to 1,718.49, 2,577.69 and 419.95

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Solution

The fourth proportional to 1,718.49, 2,577.69 and 419.95 is: 629.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,718.49 : 2,577.69 = 419.95 : x
  2. Step 2: Convert to fraction form
    1,718.49/2,577.69 = 419.95/x
  3. Step 3: Cross multiply
    1,718.49x = 2,577.69 × 419.95
  4. Step 4: Simplify right side
    1,718.49x = 1,082,500.92
  5. Step 5: Solve for x
    x = 1,082,500.92/1,718.49
  6. Step 6: Final answer
    x = 629.91

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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.