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Finding the Fourth Proportional to 3,007.74, 4,511.60 and 816.47

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Solution

The fourth proportional to 3,007.74, 4,511.60 and 816.47 is: 1,224.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,007.74 : 4,511.60 = 816.47 : x
  2. Step 2: Convert to fraction form
    3,007.74/4,511.60 = 816.47/x
  3. Step 3: Cross multiply
    3,007.74x = 4,511.60 × 816.47
  4. Step 4: Simplify right side
    3,007.74x = 3,683,586.05
  5. Step 5: Solve for x
    x = 3,683,586.05/3,007.74
  6. Step 6: Final answer
    x = 1,224.70

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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.