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Finding the Fourth Proportional to 560.90, 839.55 and 300.25

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Solution

The fourth proportional to 560.90, 839.55 and 300.25 is: 449.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.90 : 839.55 = 300.25 : x
  2. Step 2: Convert to fraction form
    560.90/839.55 = 300.25/x
  3. Step 3: Cross multiply
    560.90x = 839.55 × 300.25
  4. Step 4: Simplify right side
    560.90x = 252,074.89
  5. Step 5: Solve for x
    x = 252,074.89/560.90
  6. Step 6: Final answer
    x = 449.41

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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.