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Finding the Fourth Proportional to 658,288.80, 987,465.60 and 343,360.80

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Solution

The fourth proportional to 658,288.80, 987,465.60 and 343,360.80 is: 515,058.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,288.80 : 987,465.60 = 343,360.80 : x
  2. Step 2: Convert to fraction form
    658,288.80/987,465.60 = 343,360.80/x
  3. Step 3: Cross multiply
    658,288.80x = 987,465.60 × 343,360.80
  4. Step 4: Simplify right side
    658,288.80x = 339,056,978,388.48
  5. Step 5: Solve for x
    x = 339,056,978,388.48/658,288.80
  6. Step 6: Final answer
    x = 515,058.10

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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.