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Finding the Fourth Proportional to 608.98, 838.32 and 529.20

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Solution

The fourth proportional to 608.98, 838.32 and 529.20 is: 728.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.98 : 838.32 = 529.20 : x
  2. Step 2: Convert to fraction form
    608.98/838.32 = 529.20/x
  3. Step 3: Cross multiply
    608.98x = 838.32 × 529.20
  4. Step 4: Simplify right side
    608.98x = 443,638.94
  5. Step 5: Solve for x
    x = 443,638.94/608.98
  6. Step 6: Final answer
    x = 728.50

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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.