Home / 1,213,981.80-1,820,972.70-647,111.40

Finding the Fourth Proportional to 1,213,981.80, 1,820,972.70 and 647,111.40

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Solution

The fourth proportional to 1,213,981.80, 1,820,972.70 and 647,111.40 is: 970,667.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213,981.80 : 1,820,972.70 = 647,111.40 : x
  2. Step 2: Convert to fraction form
    1,213,981.80/1,820,972.70 = 647,111.40/x
  3. Step 3: Cross multiply
    1,213,981.80x = 1,820,972.70 × 647,111.40
  4. Step 4: Simplify right side
    1,213,981.80x = 1,178,372,193,258.78
  5. Step 5: Solve for x
    x = 1,178,372,193,258.78/1,213,981.80
  6. Step 6: Final answer
    x = 970,667.10

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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.