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Finding the Fourth Proportional to 1,696,287.15, 2,340,894.40 and 921,918.11

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Solution

The fourth proportional to 1,696,287.15, 2,340,894.40 and 921,918.11 is: 1,272,256.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,696,287.15 : 2,340,894.40 = 921,918.11 : x
  2. Step 2: Convert to fraction form
    1,696,287.15/2,340,894.40 = 921,918.11/x
  3. Step 3: Cross multiply
    1,696,287.15x = 2,340,894.40 × 921,918.11
  4. Step 4: Simplify right side
    1,696,287.15x = 2,158,112,926,948.32
  5. Step 5: Solve for x
    x = 2,158,112,926,948.32/1,696,287.15
  6. Step 6: Final answer
    x = 1,272,256.84

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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.