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Finding the Fourth Proportional to 680,729.94, 939,399.73 and 374,800

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Solution

The fourth proportional to 680,729.94, 939,399.73 and 374,800 is: 517,219.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,729.94 : 939,399.73 = 374,800 : x
  2. Step 2: Convert to fraction form
    680,729.94/939,399.73 = 374,800/x
  3. Step 3: Cross multiply
    680,729.94x = 939,399.73 × 374,800
  4. Step 4: Simplify right side
    680,729.94x = 352,087,018,804
  5. Step 5: Solve for x
    x = 352,087,018,804/680,729.94
  6. Step 6: Final answer
    x = 517,219.82

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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.