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Finding the Fourth Proportional to 1,225.57, 1,838.33 and 494.63

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Solution

The fourth proportional to 1,225.57, 1,838.33 and 494.63 is: 741.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225.57 : 1,838.33 = 494.63 : x
  2. Step 2: Convert to fraction form
    1,225.57/1,838.33 = 494.63/x
  3. Step 3: Cross multiply
    1,225.57x = 1,838.33 × 494.63
  4. Step 4: Simplify right side
    1,225.57x = 909,285.21
  5. Step 5: Solve for x
    x = 909,285.21/1,225.57
  6. Step 6: Final answer
    x = 741.93

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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.