Home / 1,386,728.76-2,080,170.90-389,379

Finding the Fourth Proportional to 1,386,728.76, 2,080,170.90 and 389,379

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Solution

The fourth proportional to 1,386,728.76, 2,080,170.90 and 389,379 is: 584,090.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386,728.76 : 2,080,170.90 = 389,379 : x
  2. Step 2: Convert to fraction form
    1,386,728.76/2,080,170.90 = 389,379/x
  3. Step 3: Cross multiply
    1,386,728.76x = 2,080,170.90 × 389,379
  4. Step 4: Simplify right side
    1,386,728.76x = 809,974,864,871.10
  5. Step 5: Solve for x
    x = 809,974,864,871.10/1,386,728.76
  6. Step 6: Final answer
    x = 584,090.33

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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.