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Finding the Fourth Proportional to 1,908,641, 2,862,978.78 and 578,945

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Solution

The fourth proportional to 1,908,641, 2,862,978.78 and 578,945 is: 868,422.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,908,641 : 2,862,978.78 = 578,945 : x
  2. Step 2: Convert to fraction form
    1,908,641/2,862,978.78 = 578,945/x
  3. Step 3: Cross multiply
    1,908,641x = 2,862,978.78 × 578,945
  4. Step 4: Simplify right side
    1,908,641x = 1,657,507,249,787.10
  5. Step 5: Solve for x
    x = 1,657,507,249,787.10/1,908,641
  6. Step 6: Final answer
    x = 868,422.74

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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.