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Finding the Fourth Proportional to 658,378.80, 987,568.20 and 552,090.60

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Solution

The fourth proportional to 658,378.80, 987,568.20 and 552,090.60 is: 828,135.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,378.80 : 987,568.20 = 552,090.60 : x
  2. Step 2: Convert to fraction form
    658,378.80/987,568.20 = 552,090.60/x
  3. Step 3: Cross multiply
    658,378.80x = 987,568.20 × 552,090.60
  4. Step 4: Simplify right side
    658,378.80x = 545,227,120,078.92
  5. Step 5: Solve for x
    x = 545,227,120,078.92/658,378.80
  6. Step 6: Final answer
    x = 828,135.90

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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.