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Finding the Fourth Proportional to 818.37, 1,225.38 and 558.89

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Solution

The fourth proportional to 818.37, 1,225.38 and 558.89 is: 836.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.37 : 1,225.38 = 558.89 : x
  2. Step 2: Convert to fraction form
    818.37/1,225.38 = 558.89/x
  3. Step 3: Cross multiply
    818.37x = 1,225.38 × 558.89
  4. Step 4: Simplify right side
    818.37x = 684,846.50
  5. Step 5: Solve for x
    x = 684,846.50/818.37
  6. Step 6: Final answer
    x = 836.84

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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.