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Finding the Fourth Proportional to 525.54, 786.55 and 395.20

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Solution

The fourth proportional to 525.54, 786.55 and 395.20 is: 591.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.54 : 786.55 = 395.20 : x
  2. Step 2: Convert to fraction form
    525.54/786.55 = 395.20/x
  3. Step 3: Cross multiply
    525.54x = 786.55 × 395.20
  4. Step 4: Simplify right side
    525.54x = 310,846.95
  5. Step 5: Solve for x
    x = 310,846.95/525.54
  6. Step 6: Final answer
    x = 591.48

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1.5x scale

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.