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Finding the Fourth Proportional to 623.28, 935.48 and 407.12

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Solution

The fourth proportional to 623.28, 935.48 and 407.12 is: 611.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.28 : 935.48 = 407.12 : x
  2. Step 2: Convert to fraction form
    623.28/935.48 = 407.12/x
  3. Step 3: Cross multiply
    623.28x = 935.48 × 407.12
  4. Step 4: Simplify right side
    623.28x = 380,852.62
  5. Step 5: Solve for x
    x = 380,852.62/623.28
  6. Step 6: Final answer
    x = 611.05

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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.