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Finding the Fourth Proportional to 1,812.69, 2,718.68 and 887.85

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Solution

The fourth proportional to 1,812.69, 2,718.68 and 887.85 is: 1,331.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,812.69 : 2,718.68 = 887.85 : x
  2. Step 2: Convert to fraction form
    1,812.69/2,718.68 = 887.85/x
  3. Step 3: Cross multiply
    1,812.69x = 2,718.68 × 887.85
  4. Step 4: Simplify right side
    1,812.69x = 2,413,775.60
  5. Step 5: Solve for x
    x = 2,413,775.60/1,812.69
  6. Step 6: Final answer
    x = 1,331.60

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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.