Home / 1,489,120.40-2,231,218.20-856,931.60

Finding the Fourth Proportional to 1,489,120.40, 2,231,218.20 and 856,931.60

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Solution

The fourth proportional to 1,489,120.40, 2,231,218.20 and 856,931.60 is: 1,283,980.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489,120.40 : 2,231,218.20 = 856,931.60 : x
  2. Step 2: Convert to fraction form
    1,489,120.40/2,231,218.20 = 856,931.60/x
  3. Step 3: Cross multiply
    1,489,120.40x = 2,231,218.20 × 856,931.60
  4. Step 4: Simplify right side
    1,489,120.40x = 1,912,001,382,075.12
  5. Step 5: Solve for x
    x = 1,912,001,382,075.12/1,489,120.40
  6. Step 6: Final answer
    x = 1,283,980.38

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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.