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Finding the Fourth Proportional to 545.88, 753.60 and 421.27

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Solution

The fourth proportional to 545.88, 753.60 and 421.27 is: 581.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.88 : 753.60 = 421.27 : x
  2. Step 2: Convert to fraction form
    545.88/753.60 = 421.27/x
  3. Step 3: Cross multiply
    545.88x = 753.60 × 421.27
  4. Step 4: Simplify right side
    545.88x = 317,469.07
  5. Step 5: Solve for x
    x = 317,469.07/545.88
  6. Step 6: Final answer
    x = 581.57

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.