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Finding the Fourth Proportional to 623.03, 860.19 and 387.23

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Solution

The fourth proportional to 623.03, 860.19 and 387.23 is: 534.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.03 : 860.19 = 387.23 : x
  2. Step 2: Convert to fraction form
    623.03/860.19 = 387.23/x
  3. Step 3: Cross multiply
    623.03x = 860.19 × 387.23
  4. Step 4: Simplify right side
    623.03x = 333,091.37
  5. Step 5: Solve for x
    x = 333,091.37/623.03
  6. Step 6: Final answer
    x = 534.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.