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Finding the Fourth Proportional to 545.81, 820.13 and 340.47

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Solution

The fourth proportional to 545.81, 820.13 and 340.47 is: 511.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.81 : 820.13 = 340.47 : x
  2. Step 2: Convert to fraction form
    545.81/820.13 = 340.47/x
  3. Step 3: Cross multiply
    545.81x = 820.13 × 340.47
  4. Step 4: Simplify right side
    545.81x = 279,227.96
  5. Step 5: Solve for x
    x = 279,227.96/545.81
  6. Step 6: Final answer
    x = 511.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.