Home / 815,918.64-1,224,121.32-389,773.68

Finding the Fourth Proportional to 815,918.64, 1,224,121.32 and 389,773.68

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Solution

The fourth proportional to 815,918.64, 1,224,121.32 and 389,773.68 is: 584,776.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,918.64 : 1,224,121.32 = 389,773.68 : x
  2. Step 2: Convert to fraction form
    815,918.64/1,224,121.32 = 389,773.68/x
  3. Step 3: Cross multiply
    815,918.64x = 1,224,121.32 × 389,773.68
  4. Step 4: Simplify right side
    815,918.64x = 477,130,271,662.86
  5. Step 5: Solve for x
    x = 477,130,271,662.86/815,918.64
  6. Step 6: Final answer
    x = 584,776.78

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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.