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Finding the Fourth Proportional to 1,651.84, 2,477.76 and 419.25

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Solution

The fourth proportional to 1,651.84, 2,477.76 and 419.25 is: 628.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,651.84 : 2,477.76 = 419.25 : x
  2. Step 2: Convert to fraction form
    1,651.84/2,477.76 = 419.25/x
  3. Step 3: Cross multiply
    1,651.84x = 2,477.76 × 419.25
  4. Step 4: Simplify right side
    1,651.84x = 1,038,790.02
  5. Step 5: Solve for x
    x = 1,038,790.02/1,651.84
  6. Step 6: Final answer
    x = 628.87

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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.