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Finding the Fourth Proportional to 1,254.61, 1,882.23 and 388.99

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Solution

The fourth proportional to 1,254.61, 1,882.23 and 388.99 is: 583.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,254.61 : 1,882.23 = 388.99 : x
  2. Step 2: Convert to fraction form
    1,254.61/1,882.23 = 388.99/x
  3. Step 3: Cross multiply
    1,254.61x = 1,882.23 × 388.99
  4. Step 4: Simplify right side
    1,254.61x = 732,168.65
  5. Step 5: Solve for x
    x = 732,168.65/1,254.61
  6. Step 6: Final answer
    x = 583.58

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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.