Home / 859,505.80-1,289,262.30-290,891.40

Finding the Fourth Proportional to 859,505.80, 1,289,262.30 and 290,891.40

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Solution

The fourth proportional to 859,505.80, 1,289,262.30 and 290,891.40 is: 436,338.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,505.80 : 1,289,262.30 = 290,891.40 : x
  2. Step 2: Convert to fraction form
    859,505.80/1,289,262.30 = 290,891.40/x
  3. Step 3: Cross multiply
    859,505.80x = 1,289,262.30 × 290,891.40
  4. Step 4: Simplify right side
    859,505.80x = 375,035,315,414.22
  5. Step 5: Solve for x
    x = 375,035,315,414.22/859,505.80
  6. Step 6: Final answer
    x = 436,338.32

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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.