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Finding the Fourth Proportional to 558.70, 838.32 and 547.63

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Solution

The fourth proportional to 558.70, 838.32 and 547.63 is: 821.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.70 : 838.32 = 547.63 : x
  2. Step 2: Convert to fraction form
    558.70/838.32 = 547.63/x
  3. Step 3: Cross multiply
    558.70x = 838.32 × 547.63
  4. Step 4: Simplify right side
    558.70x = 459,089.18
  5. Step 5: Solve for x
    x = 459,089.18/558.70
  6. Step 6: Final answer
    x = 821.71

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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.