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Finding the Fourth Proportional to 548.75, 757.55 and 393.77

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Solution

The fourth proportional to 548.75, 757.55 and 393.77 is: 543.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.75 : 757.55 = 393.77 : x
  2. Step 2: Convert to fraction form
    548.75/757.55 = 393.77/x
  3. Step 3: Cross multiply
    548.75x = 757.55 × 393.77
  4. Step 4: Simplify right side
    548.75x = 298,300.46
  5. Step 5: Solve for x
    x = 298,300.46/548.75
  6. Step 6: Final answer
    x = 543.60

Related Problems

Find fourth proportional to 274.38, 378.78 and 196.89
Half scale
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Double scale
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Similar ratio
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1.5x scale

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.