Home / 1,389,784.17-1,917,934.64-777,921.72

Finding the Fourth Proportional to 1,389,784.17, 1,917,934.64 and 777,921.72

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Solution

The fourth proportional to 1,389,784.17, 1,917,934.64 and 777,921.72 is: 1,073,550.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,784.17 : 1,917,934.64 = 777,921.72 : x
  2. Step 2: Convert to fraction form
    1,389,784.17/1,917,934.64 = 777,921.72/x
  3. Step 3: Cross multiply
    1,389,784.17x = 1,917,934.64 × 777,921.72
  4. Step 4: Simplify right side
    1,389,784.17x = 1,492,003,013,996.38
  5. Step 5: Solve for x
    x = 1,492,003,013,996.38/1,389,784.17
  6. Step 6: Final answer
    x = 1,073,550.16

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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.