Home / 1,913,206.78-2,640,125.73-1,188,038.95

Finding the Fourth Proportional to 1,913,206.78, 2,640,125.73 and 1,188,038.95

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Solution

The fourth proportional to 1,913,206.78, 2,640,125.73 and 1,188,038.95 is: 1,639,431.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913,206.78 : 2,640,125.73 = 1,188,038.95 : x
  2. Step 2: Convert to fraction form
    1,913,206.78/2,640,125.73 = 1,188,038.95/x
  3. Step 3: Cross multiply
    1,913,206.78x = 2,640,125.73 × 1,188,038.95
  4. Step 4: Simplify right side
    1,913,206.78x = 3,136,572,200,137.18
  5. Step 5: Solve for x
    x = 3,136,572,200,137.18/1,913,206.78
  6. Step 6: Final answer
    x = 1,639,431.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.