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Finding the Fourth Proportional to 1,398,599.94, 1,930,011.84 and 786,764.82

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Solution

The fourth proportional to 1,398,599.94, 1,930,011.84 and 786,764.82 is: 1,085,703.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,599.94 : 1,930,011.84 = 786,764.82 : x
  2. Step 2: Convert to fraction form
    1,398,599.94/1,930,011.84 = 786,764.82/x
  3. Step 3: Cross multiply
    1,398,599.94x = 1,930,011.84 × 786,764.82
  4. Step 4: Simplify right side
    1,398,599.94x = 1,518,465,417,895.47
  5. Step 5: Solve for x
    x = 1,518,465,417,895.47/1,398,599.94
  6. Step 6: Final answer
    x = 1,085,703.91

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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.