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Finding the Fourth Proportional to 1,386.50, 2,078.82 and 563.74

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Solution

The fourth proportional to 1,386.50, 2,078.82 and 563.74 is: 845.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386.50 : 2,078.82 = 563.74 : x
  2. Step 2: Convert to fraction form
    1,386.50/2,078.82 = 563.74/x
  3. Step 3: Cross multiply
    1,386.50x = 2,078.82 × 563.74
  4. Step 4: Simplify right side
    1,386.50x = 1,171,913.99
  5. Step 5: Solve for x
    x = 1,171,913.99/1,386.50
  6. Step 6: Final answer
    x = 845.23

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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.