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Finding the Fourth Proportional to 559.08, 837.18 and 386.28

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Solution

The fourth proportional to 559.08, 837.18 and 386.28 is: 578.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.08 : 837.18 = 386.28 : x
  2. Step 2: Convert to fraction form
    559.08/837.18 = 386.28/x
  3. Step 3: Cross multiply
    559.08x = 837.18 × 386.28
  4. Step 4: Simplify right side
    559.08x = 323,385.89
  5. Step 5: Solve for x
    x = 323,385.89/559.08
  6. Step 6: Final answer
    x = 578.43

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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.