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Finding the Fourth Proportional to 525.72, 788.76 and 449.40

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Solution

The fourth proportional to 525.72, 788.76 and 449.40 is: 674.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.72 : 788.76 = 449.40 : x
  2. Step 2: Convert to fraction form
    525.72/788.76 = 449.40/x
  3. Step 3: Cross multiply
    525.72x = 788.76 × 449.40
  4. Step 4: Simplify right side
    525.72x = 354,468.74
  5. Step 5: Solve for x
    x = 354,468.74/525.72
  6. Step 6: Final answer
    x = 674.25

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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.