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Finding the Fourth Proportional to 1,188,385, 1,639,974 and 679,086.16

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Solution

The fourth proportional to 1,188,385, 1,639,974 and 679,086.16 is: 937,140.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188,385 : 1,639,974 = 679,086.16 : x
  2. Step 2: Convert to fraction form
    1,188,385/1,639,974 = 679,086.16/x
  3. Step 3: Cross multiply
    1,188,385x = 1,639,974 × 679,086.16
  4. Step 4: Simplify right side
    1,188,385x = 1,113,683,646,159.84
  5. Step 5: Solve for x
    x = 1,113,683,646,159.84/1,188,385
  6. Step 6: Final answer
    x = 937,140.44

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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.