Home / 921,873.60-1,383,004.80-389,120.40

Finding the Fourth Proportional to 921,873.60, 1,383,004.80 and 389,120.40

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Solution

The fourth proportional to 921,873.60, 1,383,004.80 and 389,120.40 is: 583,762.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,873.60 : 1,383,004.80 = 389,120.40 : x
  2. Step 2: Convert to fraction form
    921,873.60/1,383,004.80 = 389,120.40/x
  3. Step 3: Cross multiply
    921,873.60x = 1,383,004.80 × 389,120.40
  4. Step 4: Simplify right side
    921,873.60x = 538,155,380,977.92
  5. Step 5: Solve for x
    x = 538,155,380,977.92/921,873.60
  6. Step 6: Final answer
    x = 583,762.66

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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.