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Finding the Fourth Proportional to 1,225.58, 1,834.87 and 1,147.99

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Solution

The fourth proportional to 1,225.58, 1,834.87 and 1,147.99 is: 1,718.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225.58 : 1,834.87 = 1,147.99 : x
  2. Step 2: Convert to fraction form
    1,225.58/1,834.87 = 1,147.99/x
  3. Step 3: Cross multiply
    1,225.58x = 1,834.87 × 1,147.99
  4. Step 4: Simplify right side
    1,225.58x = 2,106,406.67
  5. Step 5: Solve for x
    x = 2,106,406.67/1,225.58
  6. Step 6: Final answer
    x = 1,718.70

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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.