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Finding the Fourth Proportional to 627,796.40, 940,139.40 and 402,810.80

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Solution

The fourth proportional to 627,796.40, 940,139.40 and 402,810.80 is: 603,218.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,796.40 : 940,139.40 = 402,810.80 : x
  2. Step 2: Convert to fraction form
    627,796.40/940,139.40 = 402,810.80/x
  3. Step 3: Cross multiply
    627,796.40x = 940,139.40 × 402,810.80
  4. Step 4: Simplify right side
    627,796.40x = 378,698,303,825.52
  5. Step 5: Solve for x
    x = 378,698,303,825.52/627,796.40
  6. Step 6: Final answer
    x = 603,218.34

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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.