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Finding the Fourth Proportional to 545.76, 753.35 and 388.62

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Solution

The fourth proportional to 545.76, 753.35 and 388.62 is: 536.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.76 : 753.35 = 388.62 : x
  2. Step 2: Convert to fraction form
    545.76/753.35 = 388.62/x
  3. Step 3: Cross multiply
    545.76x = 753.35 × 388.62
  4. Step 4: Simplify right side
    545.76x = 292,766.88
  5. Step 5: Solve for x
    x = 292,766.88/545.76
  6. Step 6: Final answer
    x = 536.44

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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.