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Finding the Fourth Proportional to 434.44, 648.23 and 393.40

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Solution

The fourth proportional to 434.44, 648.23 and 393.40 is: 586.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.44 : 648.23 = 393.40 : x
  2. Step 2: Convert to fraction form
    434.44/648.23 = 393.40/x
  3. Step 3: Cross multiply
    434.44x = 648.23 × 393.40
  4. Step 4: Simplify right side
    434.44x = 255,013.68
  5. Step 5: Solve for x
    x = 255,013.68/434.44
  6. Step 6: Final answer
    x = 586.99

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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.