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Finding the Fourth Proportional to 495.15, 683.38 and 298.77

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Solution

The fourth proportional to 495.15, 683.38 and 298.77 is: 412.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.15 : 683.38 = 298.77 : x
  2. Step 2: Convert to fraction form
    495.15/683.38 = 298.77/x
  3. Step 3: Cross multiply
    495.15x = 683.38 × 298.77
  4. Step 4: Simplify right side
    495.15x = 204,173.82
  5. Step 5: Solve for x
    x = 204,173.82/495.15
  6. Step 6: Final answer
    x = 412.35

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1.5x scale

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.