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Finding the Fourth Proportional to 620.67, 856.53 and 340.93

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Solution

The fourth proportional to 620.67, 856.53 and 340.93 is: 470.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.67 : 856.53 = 340.93 : x
  2. Step 2: Convert to fraction form
    620.67/856.53 = 340.93/x
  3. Step 3: Cross multiply
    620.67x = 856.53 × 340.93
  4. Step 4: Simplify right side
    620.67x = 292,016.77
  5. Step 5: Solve for x
    x = 292,016.77/620.67
  6. Step 6: Final answer
    x = 470.49

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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.