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Finding the Fourth Proportional to 1,210.20, 1,813.62 and 559.56

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Solution

The fourth proportional to 1,210.20, 1,813.62 and 559.56 is: 838.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.20 : 1,813.62 = 559.56 : x
  2. Step 2: Convert to fraction form
    1,210.20/1,813.62 = 559.56/x
  3. Step 3: Cross multiply
    1,210.20x = 1,813.62 × 559.56
  4. Step 4: Simplify right side
    1,210.20x = 1,014,829.21
  5. Step 5: Solve for x
    x = 1,014,829.21/1,210.20
  6. Step 6: Final answer
    x = 838.56

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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.