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Finding the Fourth Proportional to 692,679.80, 1,039,078.86 and 243,361.64

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Solution

The fourth proportional to 692,679.80, 1,039,078.86 and 243,361.64 is: 365,063.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,679.80 : 1,039,078.86 = 243,361.64 : x
  2. Step 2: Convert to fraction form
    692,679.80/1,039,078.86 = 243,361.64/x
  3. Step 3: Cross multiply
    692,679.80x = 1,039,078.86 × 243,361.64
  4. Step 4: Simplify right side
    692,679.80x = 252,871,935,458.93
  5. Step 5: Solve for x
    x = 252,871,935,458.93/692,679.80
  6. Step 6: Final answer
    x = 365,063.24

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1.5x scale

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.