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Finding the Fourth Proportional to 559.94, 770.86 and 485.96

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Solution

The fourth proportional to 559.94, 770.86 and 485.96 is: 669.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.94 : 770.86 = 485.96 : x
  2. Step 2: Convert to fraction form
    559.94/770.86 = 485.96/x
  3. Step 3: Cross multiply
    559.94x = 770.86 × 485.96
  4. Step 4: Simplify right side
    559.94x = 374,607.13
  5. Step 5: Solve for x
    x = 374,607.13/559.94
  6. Step 6: Final answer
    x = 669.01

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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.