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Finding the Fourth Proportional to 545.19, 816.96 and 328.53

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Solution

The fourth proportional to 545.19, 816.96 and 328.53 is: 492.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.19 : 816.96 = 328.53 : x
  2. Step 2: Convert to fraction form
    545.19/816.96 = 328.53/x
  3. Step 3: Cross multiply
    545.19x = 816.96 × 328.53
  4. Step 4: Simplify right side
    545.19x = 268,395.87
  5. Step 5: Solve for x
    x = 268,395.87/545.19
  6. Step 6: Final answer
    x = 492.30

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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.