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Finding the Fourth Proportional to 520,076.40, 779,884.20 and 239,679.60

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Solution

The fourth proportional to 520,076.40, 779,884.20 and 239,679.60 is: 359,413.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,076.40 : 779,884.20 = 239,679.60 : x
  2. Step 2: Convert to fraction form
    520,076.40/779,884.20 = 239,679.60/x
  3. Step 3: Cross multiply
    520,076.40x = 779,884.20 × 239,679.60
  4. Step 4: Simplify right side
    520,076.40x = 186,922,333,102.32
  5. Step 5: Solve for x
    x = 186,922,333,102.32/520,076.40
  6. Step 6: Final answer
    x = 359,413.22

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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.