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Finding the Fourth Proportional to 435.76, 601.20 and 258.70

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Solution

The fourth proportional to 435.76, 601.20 and 258.70 is: 356.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.76 : 601.20 = 258.70 : x
  2. Step 2: Convert to fraction form
    435.76/601.20 = 258.70/x
  3. Step 3: Cross multiply
    435.76x = 601.20 × 258.70
  4. Step 4: Simplify right side
    435.76x = 155,530.44
  5. Step 5: Solve for x
    x = 155,530.44/435.76
  6. Step 6: Final answer
    x = 356.92

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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.