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Finding the Fourth Proportional to 1,179,360, 1,769,040 and 391,392

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Solution

The fourth proportional to 1,179,360, 1,769,040 and 391,392 is: 587,088

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,179,360 : 1,769,040 = 391,392 : x
  2. Step 2: Convert to fraction form
    1,179,360/1,769,040 = 391,392/x
  3. Step 3: Cross multiply
    1,179,360x = 1,769,040 × 391,392
  4. Step 4: Simplify right side
    1,179,360x = 692,388,103,680
  5. Step 5: Solve for x
    x = 692,388,103,680/1,179,360
  6. Step 6: Final answer
    x = 587,088

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.