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Finding the Fourth Proportional to 1,274,580, 1,911,870 and 388,116

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Solution

The fourth proportional to 1,274,580, 1,911,870 and 388,116 is: 582,174

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,274,580 : 1,911,870 = 388,116 : x
  2. Step 2: Convert to fraction form
    1,274,580/1,911,870 = 388,116/x
  3. Step 3: Cross multiply
    1,274,580x = 1,911,870 × 388,116
  4. Step 4: Simplify right side
    1,274,580x = 742,027,336,920
  5. Step 5: Solve for x
    x = 742,027,336,920/1,274,580
  6. Step 6: Final answer
    x = 582,174

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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.