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Finding the Fourth Proportional to 439,780.40, 659,670.60 and 439,780.40

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Solution

The fourth proportional to 439,780.40, 659,670.60 and 439,780.40 is: 659,670.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,780.40 : 659,670.60 = 439,780.40 : x
  2. Step 2: Convert to fraction form
    439,780.40/659,670.60 = 439,780.40/x
  3. Step 3: Cross multiply
    439,780.40x = 659,670.60 × 439,780.40
  4. Step 4: Simplify right side
    439,780.40x = 290,110,200,336.24
  5. Step 5: Solve for x
    x = 290,110,200,336.24/439,780.40
  6. Step 6: Final answer
    x = 659,670.60

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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.