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Finding the Fourth Proportional to 395.03, 589.92 and 390.74

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Solution

The fourth proportional to 395.03, 589.92 and 390.74 is: 583.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.03 : 589.92 = 390.74 : x
  2. Step 2: Convert to fraction form
    395.03/589.92 = 390.74/x
  3. Step 3: Cross multiply
    395.03x = 589.92 × 390.74
  4. Step 4: Simplify right side
    395.03x = 230,503.40
  5. Step 5: Solve for x
    x = 230,503.40/395.03
  6. Step 6: Final answer
    x = 583.51

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.