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Finding the Fourth Proportional to 2,458.62, 3,687.81 and 919.50

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Solution

The fourth proportional to 2,458.62, 3,687.81 and 919.50 is: 1,379.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,458.62 : 3,687.81 = 919.50 : x
  2. Step 2: Convert to fraction form
    2,458.62/3,687.81 = 919.50/x
  3. Step 3: Cross multiply
    2,458.62x = 3,687.81 × 919.50
  4. Step 4: Simplify right side
    2,458.62x = 3,390,941.30
  5. Step 5: Solve for x
    x = 3,390,941.30/2,458.62
  6. Step 6: Final answer
    x = 1,379.21

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Double scale
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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.