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Finding the Fourth Proportional to 3,774.80, 5,661.72 and 1,038.80

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Solution

The fourth proportional to 3,774.80, 5,661.72 and 1,038.80 is: 1,558.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,774.80 : 5,661.72 = 1,038.80 : x
  2. Step 2: Convert to fraction form
    3,774.80/5,661.72 = 1,038.80/x
  3. Step 3: Cross multiply
    3,774.80x = 5,661.72 × 1,038.80
  4. Step 4: Simplify right side
    3,774.80x = 5,881,394.74
  5. Step 5: Solve for x
    x = 5,881,394.74/3,774.80
  6. Step 6: Final answer
    x = 1,558.07

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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.