Home / 1,389,720.79-2,084,940.58-813,830.38

Finding the Fourth Proportional to 1,389,720.79, 2,084,940.58 and 813,830.38

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Solution

The fourth proportional to 1,389,720.79, 2,084,940.58 and 813,830.38 is: 1,220,956.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,720.79 : 2,084,940.58 = 813,830.38 : x
  2. Step 2: Convert to fraction form
    1,389,720.79/2,084,940.58 = 813,830.38/x
  3. Step 3: Cross multiply
    1,389,720.79x = 2,084,940.58 × 813,830.38
  4. Step 4: Simplify right side
    1,389,720.79x = 1,696,787,977,251.89
  5. Step 5: Solve for x
    x = 1,696,787,977,251.89/1,389,720.79
  6. Step 6: Final answer
    x = 1,220,956.03

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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.