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Finding the Fourth Proportional to 439,743.60, 659,615.40 and 395,420.40

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Solution

The fourth proportional to 439,743.60, 659,615.40 and 395,420.40 is: 593,130.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,743.60 : 659,615.40 = 395,420.40 : x
  2. Step 2: Convert to fraction form
    439,743.60/659,615.40 = 395,420.40/x
  3. Step 3: Cross multiply
    439,743.60x = 659,615.40 × 395,420.40
  4. Step 4: Simplify right side
    439,743.60x = 260,825,385,314.16
  5. Step 5: Solve for x
    x = 260,825,385,314.16/439,743.60
  6. Step 6: Final answer
    x = 593,130.60

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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.