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Finding the Fourth Proportional to 1,908,643, 2,862,981.78 and 578,947

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Solution

The fourth proportional to 1,908,643, 2,862,981.78 and 578,947 is: 868,425.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,908,643 : 2,862,981.78 = 578,947 : x
  2. Step 2: Convert to fraction form
    1,908,643/2,862,981.78 = 578,947/x
  3. Step 3: Cross multiply
    1,908,643x = 2,862,981.78 × 578,947
  4. Step 4: Simplify right side
    1,908,643x = 1,657,514,712,585.66
  5. Step 5: Solve for x
    x = 1,657,514,712,585.66/1,908,643
  6. Step 6: Final answer
    x = 868,425.74

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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.