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Finding the Fourth Proportional to 415.63, 573.60 and 258.40

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Solution

The fourth proportional to 415.63, 573.60 and 258.40 is: 356.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.63 : 573.60 = 258.40 : x
  2. Step 2: Convert to fraction form
    415.63/573.60 = 258.40/x
  3. Step 3: Cross multiply
    415.63x = 573.60 × 258.40
  4. Step 4: Simplify right side
    415.63x = 148,218.24
  5. Step 5: Solve for x
    x = 148,218.24/415.63
  6. Step 6: Final answer
    x = 356.61

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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.