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Finding the Fourth Proportional to 532.56, 798.48 and 258.78

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Solution

The fourth proportional to 532.56, 798.48 and 258.78 is: 388.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    532.56 : 798.48 = 258.78 : x
  2. Step 2: Convert to fraction form
    532.56/798.48 = 258.78/x
  3. Step 3: Cross multiply
    532.56x = 798.48 × 258.78
  4. Step 4: Simplify right side
    532.56x = 206,630.65
  5. Step 5: Solve for x
    x = 206,630.65/532.56
  6. Step 6: Final answer
    x = 388.00

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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.