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Finding the Fourth Proportional to 545.95, 818.15 and 383.30

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Solution

The fourth proportional to 545.95, 818.15 and 383.30 is: 574.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.95 : 818.15 = 383.30 : x
  2. Step 2: Convert to fraction form
    545.95/818.15 = 383.30/x
  3. Step 3: Cross multiply
    545.95x = 818.15 × 383.30
  4. Step 4: Simplify right side
    545.95x = 313,592.80
  5. Step 5: Solve for x
    x = 313,592.80/545.95
  6. Step 6: Final answer
    x = 574.40

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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.