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Finding the Fourth Proportional to 525.20, 788.60 and 403.60

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Solution

The fourth proportional to 525.20, 788.60 and 403.60 is: 606.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.20 : 788.60 = 403.60 : x
  2. Step 2: Convert to fraction form
    525.20/788.60 = 403.60/x
  3. Step 3: Cross multiply
    525.20x = 788.60 × 403.60
  4. Step 4: Simplify right side
    525.20x = 318,278.96
  5. Step 5: Solve for x
    x = 318,278.96/525.20
  6. Step 6: Final answer
    x = 606.01

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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.