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Finding the Fourth Proportional to 579.32, 798.86 and 402.48

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Solution

The fourth proportional to 579.32, 798.86 and 402.48 is: 555.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.32 : 798.86 = 402.48 : x
  2. Step 2: Convert to fraction form
    579.32/798.86 = 402.48/x
  3. Step 3: Cross multiply
    579.32x = 798.86 × 402.48
  4. Step 4: Simplify right side
    579.32x = 321,520.16
  5. Step 5: Solve for x
    x = 321,520.16/579.32
  6. Step 6: Final answer
    x = 555.00

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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.