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Finding the Fourth Proportional to 622.58, 933.92 and 485.36

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Solution

The fourth proportional to 622.58, 933.92 and 485.36 is: 728.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.58 : 933.92 = 485.36 : x
  2. Step 2: Convert to fraction form
    622.58/933.92 = 485.36/x
  3. Step 3: Cross multiply
    622.58x = 933.92 × 485.36
  4. Step 4: Simplify right side
    622.58x = 453,280.31
  5. Step 5: Solve for x
    x = 453,280.31/622.58
  6. Step 6: Final answer
    x = 728.07

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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.