Home / 879,890.20-1,321,439.10-769,665.40

Finding the Fourth Proportional to 879,890.20, 1,321,439.10 and 769,665.40

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Solution

The fourth proportional to 879,890.20, 1,321,439.10 and 769,665.40 is: 1,155,900.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,890.20 : 1,321,439.10 = 769,665.40 : x
  2. Step 2: Convert to fraction form
    879,890.20/1,321,439.10 = 769,665.40/x
  3. Step 3: Cross multiply
    879,890.20x = 1,321,439.10 × 769,665.40
  4. Step 4: Simplify right side
    879,890.20x = 1,017,065,953,477.14
  5. Step 5: Solve for x
    x = 1,017,065,953,477.14/879,890.20
  6. Step 6: Final answer
    x = 1,155,900.99

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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.