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Finding the Fourth Proportional to 558.95, 837.80 and 385.68

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Solution

The fourth proportional to 558.95, 837.80 and 385.68 is: 578.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.95 : 837.80 = 385.68 : x
  2. Step 2: Convert to fraction form
    558.95/837.80 = 385.68/x
  3. Step 3: Cross multiply
    558.95x = 837.80 × 385.68
  4. Step 4: Simplify right side
    558.95x = 323,120.78
  5. Step 5: Solve for x
    x = 323,120.78/558.95
  6. Step 6: Final answer
    x = 578.09

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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.