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Finding the Fourth Proportional to 622.64, 933.40 and 257.19

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Solution

The fourth proportional to 622.64, 933.40 and 257.19 is: 385.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.64 : 933.40 = 257.19 : x
  2. Step 2: Convert to fraction form
    622.64/933.40 = 257.19/x
  3. Step 3: Cross multiply
    622.64x = 933.40 × 257.19
  4. Step 4: Simplify right side
    622.64x = 240,061.15
  5. Step 5: Solve for x
    x = 240,061.15/622.64
  6. Step 6: Final answer
    x = 385.55

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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.