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Finding the Fourth Proportional to 357.03, 495.20 and 342.45

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Solution

The fourth proportional to 357.03, 495.20 and 342.45 is: 474.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.03 : 495.20 = 342.45 : x
  2. Step 2: Convert to fraction form
    357.03/495.20 = 342.45/x
  3. Step 3: Cross multiply
    357.03x = 495.20 × 342.45
  4. Step 4: Simplify right side
    357.03x = 169,582.10
  5. Step 5: Solve for x
    x = 169,582.10/357.03
  6. Step 6: Final answer
    x = 474.98

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.