Home / 1,389,789.36-2,084,018.22-678,985.20

Finding the Fourth Proportional to 1,389,789.36, 2,084,018.22 and 678,985.20

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Solution

The fourth proportional to 1,389,789.36, 2,084,018.22 and 678,985.20 is: 1,018,152.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,789.36 : 2,084,018.22 = 678,985.20 : x
  2. Step 2: Convert to fraction form
    1,389,789.36/2,084,018.22 = 678,985.20/x
  3. Step 3: Cross multiply
    1,389,789.36x = 2,084,018.22 × 678,985.20
  4. Step 4: Simplify right side
    1,389,789.36x = 1,415,017,527,910.34
  5. Step 5: Solve for x
    x = 1,415,017,527,910.34/1,389,789.36
  6. Step 6: Final answer
    x = 1,018,152.51

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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.