Home / 1,389,083.80-2,080,348.90-858,242.20

Finding the Fourth Proportional to 1,389,083.80, 2,080,348.90 and 858,242.20

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Solution

The fourth proportional to 1,389,083.80, 2,080,348.90 and 858,242.20 is: 1,285,338.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,083.80 : 2,080,348.90 = 858,242.20 : x
  2. Step 2: Convert to fraction form
    1,389,083.80/2,080,348.90 = 858,242.20/x
  3. Step 3: Cross multiply
    1,389,083.80x = 2,080,348.90 × 858,242.20
  4. Step 4: Simplify right side
    1,389,083.80x = 1,785,443,216,703.58
  5. Step 5: Solve for x
    x = 1,785,443,216,703.58/1,389,083.80
  6. Step 6: Final answer
    x = 1,285,338.74

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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.