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Finding the Fourth Proportional to 1,261,864, 1,891,862.88 and 763,117.12

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Solution

The fourth proportional to 1,261,864, 1,891,862.88 and 763,117.12 is: 1,144,111.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261,864 : 1,891,862.88 = 763,117.12 : x
  2. Step 2: Convert to fraction form
    1,261,864/1,891,862.88 = 763,117.12/x
  3. Step 3: Cross multiply
    1,261,864x = 1,891,862.88 × 763,117.12
  4. Step 4: Simplify right side
    1,261,864x = 1,443,712,952,420.51
  5. Step 5: Solve for x
    x = 1,443,712,952,420.51/1,261,864
  6. Step 6: Final answer
    x = 1,144,111.37

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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.