Home / 2,105,999.80-3,158,999.70-686,199.40

Finding the Fourth Proportional to 2,105,999.80, 3,158,999.70 and 686,199.40

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Solution

The fourth proportional to 2,105,999.80, 3,158,999.70 and 686,199.40 is: 1,029,299.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,105,999.80 : 3,158,999.70 = 686,199.40 : x
  2. Step 2: Convert to fraction form
    2,105,999.80/3,158,999.70 = 686,199.40/x
  3. Step 3: Cross multiply
    2,105,999.80x = 3,158,999.70 × 686,199.40
  4. Step 4: Simplify right side
    2,105,999.80x = 2,167,703,698,740.18
  5. Step 5: Solve for x
    x = 2,167,703,698,740.18/2,105,999.80
  6. Step 6: Final answer
    x = 1,029,299.10

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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.