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Finding the Fourth Proportional to 622.40, 933.60 and 561.65

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Solution

The fourth proportional to 622.40, 933.60 and 561.65 is: 842.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.40 : 933.60 = 561.65 : x
  2. Step 2: Convert to fraction form
    622.40/933.60 = 561.65/x
  3. Step 3: Cross multiply
    622.40x = 933.60 × 561.65
  4. Step 4: Simplify right side
    622.40x = 524,356.44
  5. Step 5: Solve for x
    x = 524,356.44/622.40
  6. Step 6: Final answer
    x = 842.48

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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.