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Finding the Fourth Proportional to 620.97, 856.93 and 358.99

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Solution

The fourth proportional to 620.97, 856.93 and 358.99 is: 495.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.97 : 856.93 = 358.99 : x
  2. Step 2: Convert to fraction form
    620.97/856.93 = 358.99/x
  3. Step 3: Cross multiply
    620.97x = 856.93 × 358.99
  4. Step 4: Simplify right side
    620.97x = 307,629.30
  5. Step 5: Solve for x
    x = 307,629.30/620.97
  6. Step 6: Final answer
    x = 495.40

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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.