Home / 919,788.64-1,379,219.27-279,969.64

Finding the Fourth Proportional to 919,788.64, 1,379,219.27 and 279,969.64

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Solution

The fourth proportional to 919,788.64, 1,379,219.27 and 279,969.64 is: 419,813.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,788.64 : 1,379,219.27 = 279,969.64 : x
  2. Step 2: Convert to fraction form
    919,788.64/1,379,219.27 = 279,969.64/x
  3. Step 3: Cross multiply
    919,788.64x = 1,379,219.27 × 279,969.64
  4. Step 4: Simplify right side
    919,788.64x = 386,139,516,306.79
  5. Step 5: Solve for x
    x = 386,139,516,306.79/919,788.64
  6. Step 6: Final answer
    x = 419,813.32

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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.