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Finding the Fourth Proportional to 1,112.26, 1,664.60 and 914.98

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Solution

The fourth proportional to 1,112.26, 1,664.60 and 914.98 is: 1,369.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.26 : 1,664.60 = 914.98 : x
  2. Step 2: Convert to fraction form
    1,112.26/1,664.60 = 914.98/x
  3. Step 3: Cross multiply
    1,112.26x = 1,664.60 × 914.98
  4. Step 4: Simplify right side
    1,112.26x = 1,523,075.71
  5. Step 5: Solve for x
    x = 1,523,075.71/1,112.26
  6. Step 6: Final answer
    x = 1,369.35

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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.