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Finding the Fourth Proportional to 1,107.80, 1,569.62 and 1,107.80

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Solution

The fourth proportional to 1,107.80, 1,569.62 and 1,107.80 is: 1,569.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,107.80 : 1,569.62 = 1,107.80 : x
  2. Step 2: Convert to fraction form
    1,107.80/1,569.62 = 1,107.80/x
  3. Step 3: Cross multiply
    1,107.80x = 1,569.62 × 1,107.80
  4. Step 4: Simplify right side
    1,107.80x = 1,738,825.04
  5. Step 5: Solve for x
    x = 1,738,825.04/1,107.80
  6. Step 6: Final answer
    x = 1,569.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.