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Finding the Fourth Proportional to 3,746.84, 5,621.72 and 1,555

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Solution

The fourth proportional to 3,746.84, 5,621.72 and 1,555 is: 2,333.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,746.84 : 5,621.72 = 1,555 : x
  2. Step 2: Convert to fraction form
    3,746.84/5,621.72 = 1,555/x
  3. Step 3: Cross multiply
    3,746.84x = 5,621.72 × 1,555
  4. Step 4: Simplify right side
    3,746.84x = 8,741,774.60
  5. Step 5: Solve for x
    x = 8,741,774.60/3,746.84
  6. Step 6: Final answer
    x = 2,333.11

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1.5x scale

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.