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Finding the Fourth Proportional to 1,386,686.80, 1,913,593.44 and 774,802

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Solution

The fourth proportional to 1,386,686.80, 1,913,593.44 and 774,802 is: 1,069,207.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386,686.80 : 1,913,593.44 = 774,802 : x
  2. Step 2: Convert to fraction form
    1,386,686.80/1,913,593.44 = 774,802/x
  3. Step 3: Cross multiply
    1,386,686.80x = 1,913,593.44 × 774,802
  4. Step 4: Simplify right side
    1,386,686.80x = 1,482,656,024,498.88
  5. Step 5: Solve for x
    x = 1,482,656,024,498.88/1,386,686.80
  6. Step 6: Final answer
    x = 1,069,207.57

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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.