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Finding the Fourth Proportional to 545.22, 817.86 and 328.50

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Solution

The fourth proportional to 545.22, 817.86 and 328.50 is: 492.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.22 : 817.86 = 328.50 : x
  2. Step 2: Convert to fraction form
    545.22/817.86 = 328.50/x
  3. Step 3: Cross multiply
    545.22x = 817.86 × 328.50
  4. Step 4: Simplify right side
    545.22x = 268,667.01
  5. Step 5: Solve for x
    x = 268,667.01/545.22
  6. Step 6: Final answer
    x = 492.77

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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.