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Finding the Fourth Proportional to 412.28, 615.47 and 357.60

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Solution

The fourth proportional to 412.28, 615.47 and 357.60 is: 533.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.28 : 615.47 = 357.60 : x
  2. Step 2: Convert to fraction form
    412.28/615.47 = 357.60/x
  3. Step 3: Cross multiply
    412.28x = 615.47 × 357.60
  4. Step 4: Simplify right side
    412.28x = 220,092.07
  5. Step 5: Solve for x
    x = 220,092.07/412.28
  6. Step 6: Final answer
    x = 533.84

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.