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Finding the Fourth Proportional to 505,373.95, 697,477.22 and 287,635.57

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Solution

The fourth proportional to 505,373.95, 697,477.22 and 287,635.57 is: 396,971.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,373.95 : 697,477.22 = 287,635.57 : x
  2. Step 2: Convert to fraction form
    505,373.95/697,477.22 = 287,635.57/x
  3. Step 3: Cross multiply
    505,373.95x = 697,477.22 × 287,635.57
  4. Step 4: Simplify right side
    505,373.95x = 200,619,252,811.15
  5. Step 5: Solve for x
    x = 200,619,252,811.15/505,373.95
  6. Step 6: Final answer
    x = 396,971.89

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.