Home / 879,889.20-1,321,437.60-769,664.40

Finding the Fourth Proportional to 879,889.20, 1,321,437.60 and 769,664.40

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Solution

The fourth proportional to 879,889.20, 1,321,437.60 and 769,664.40 is: 1,155,899.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,889.20 : 1,321,437.60 = 769,664.40 : x
  2. Step 2: Convert to fraction form
    879,889.20/1,321,437.60 = 769,664.40/x
  3. Step 3: Cross multiply
    879,889.20x = 1,321,437.60 × 769,664.40
  4. Step 4: Simplify right side
    879,889.20x = 1,017,063,477,541.44
  5. Step 5: Solve for x
    x = 1,017,063,477,541.44/879,889.20
  6. Step 6: Final answer
    x = 1,155,899.49

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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.