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Finding the Fourth Proportional to 505,372.12, 697,474.70 and 287,633.76

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Solution

The fourth proportional to 505,372.12, 697,474.70 and 287,633.76 is: 396,969.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,372.12 : 697,474.70 = 287,633.76 : x
  2. Step 2: Convert to fraction form
    505,372.12/697,474.70 = 287,633.76/x
  3. Step 3: Cross multiply
    505,372.12x = 697,474.70 × 287,633.76
  4. Step 4: Simplify right side
    505,372.12x = 200,617,270,465.87
  5. Step 5: Solve for x
    x = 200,617,270,465.87/505,372.12
  6. Step 6: Final answer
    x = 396,969.41

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1.5x scale

Why These Related Problems?

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