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Finding the Fourth Proportional to 1,692,638.65, 2,335,844.15 and 928,697.68

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Solution

The fourth proportional to 1,692,638.65, 2,335,844.15 and 928,697.68 is: 1,281,604.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,692,638.65 : 2,335,844.15 = 928,697.68 : x
  2. Step 2: Convert to fraction form
    1,692,638.65/2,335,844.15 = 928,697.68/x
  3. Step 3: Cross multiply
    1,692,638.65x = 2,335,844.15 × 928,697.68
  4. Step 4: Simplify right side
    1,692,638.65x = 2,169,293,042,946.57
  5. Step 5: Solve for x
    x = 2,169,293,042,946.57/1,692,638.65
  6. Step 6: Final answer
    x = 1,281,604.34

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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.