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Finding the Fourth Proportional to 1,188,263, 1,639,803.74 and 644,398.62

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Solution

The fourth proportional to 1,188,263, 1,639,803.74 and 644,398.62 is: 889,270.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188,263 : 1,639,803.74 = 644,398.62 : x
  2. Step 2: Convert to fraction form
    1,188,263/1,639,803.74 = 644,398.62/x
  3. Step 3: Cross multiply
    1,188,263x = 1,639,803.74 × 644,398.62
  4. Step 4: Simplify right side
    1,188,263x = 1,056,687,267,126.84
  5. Step 5: Solve for x
    x = 1,056,687,267,126.84/1,188,263
  6. Step 6: Final answer
    x = 889,270.53

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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.