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Finding the Fourth Proportional to 608.80, 918.64 and 533.20

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Solution

The fourth proportional to 608.80, 918.64 and 533.20 is: 804.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.80 : 918.64 = 533.20 : x
  2. Step 2: Convert to fraction form
    608.80/918.64 = 533.20/x
  3. Step 3: Cross multiply
    608.80x = 918.64 × 533.20
  4. Step 4: Simplify right side
    608.80x = 489,818.85
  5. Step 5: Solve for x
    x = 489,818.85/608.80
  6. Step 6: Final answer
    x = 804.56

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.