Home / 1,386,729.76-2,080,172.40-389,380

Finding the Fourth Proportional to 1,386,729.76, 2,080,172.40 and 389,380

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Solution

The fourth proportional to 1,386,729.76, 2,080,172.40 and 389,380 is: 584,091.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386,729.76 : 2,080,172.40 = 389,380 : x
  2. Step 2: Convert to fraction form
    1,386,729.76/2,080,172.40 = 389,380/x
  3. Step 3: Cross multiply
    1,386,729.76x = 2,080,172.40 × 389,380
  4. Step 4: Simplify right side
    1,386,729.76x = 809,977,529,112
  5. Step 5: Solve for x
    x = 809,977,529,112/1,386,729.76
  6. Step 6: Final answer
    x = 584,091.83

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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.