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Finding the Fourth Proportional to 1,389,348.03, 1,916,410.61 and 1,114,365.70

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Solution

The fourth proportional to 1,389,348.03, 1,916,410.61 and 1,114,365.70 is: 1,537,111.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,348.03 : 1,916,410.61 = 1,114,365.70 : x
  2. Step 2: Convert to fraction form
    1,389,348.03/1,916,410.61 = 1,114,365.70/x
  3. Step 3: Cross multiply
    1,389,348.03x = 1,916,410.61 × 1,114,365.70
  4. Step 4: Simplify right side
    1,389,348.03x = 2,135,582,250,900.08
  5. Step 5: Solve for x
    x = 2,135,582,250,900.08/1,389,348.03
  6. Step 6: Final answer
    x = 1,537,111.08

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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.