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Finding the Fourth Proportional to 439,794.80, 658,914.60 and 390,028.40

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Solution

The fourth proportional to 439,794.80, 658,914.60 and 390,028.40 is: 584,352.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,794.80 : 658,914.60 = 390,028.40 : x
  2. Step 2: Convert to fraction form
    439,794.80/658,914.60 = 390,028.40/x
  3. Step 3: Cross multiply
    439,794.80x = 658,914.60 × 390,028.40
  4. Step 4: Simplify right side
    439,794.80x = 256,995,407,174.64
  5. Step 5: Solve for x
    x = 256,995,407,174.64/439,794.80
  6. Step 6: Final answer
    x = 584,352.99

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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.