Home / 815,920.64-1,224,124.32-389,775.68

Finding the Fourth Proportional to 815,920.64, 1,224,124.32 and 389,775.68

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Solution

The fourth proportional to 815,920.64, 1,224,124.32 and 389,775.68 is: 584,779.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,920.64 : 1,224,124.32 = 389,775.68 : x
  2. Step 2: Convert to fraction form
    815,920.64/1,224,124.32 = 389,775.68/x
  3. Step 3: Cross multiply
    815,920.64x = 1,224,124.32 × 389,775.68
  4. Step 4: Simplify right side
    815,920.64x = 477,133,889,232.54
  5. Step 5: Solve for x
    x = 477,133,889,232.54/815,920.64
  6. Step 6: Final answer
    x = 584,779.78

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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.