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Finding the Fourth Proportional to 439,559.40, 659,339.10 and 289,968.60

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Solution

The fourth proportional to 439,559.40, 659,339.10 and 289,968.60 is: 434,952.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,559.40 : 659,339.10 = 289,968.60 : x
  2. Step 2: Convert to fraction form
    439,559.40/659,339.10 = 289,968.60/x
  3. Step 3: Cross multiply
    439,559.40x = 659,339.10 × 289,968.60
  4. Step 4: Simplify right side
    439,559.40x = 191,187,635,752.26
  5. Step 5: Solve for x
    x = 191,187,635,752.26/439,559.40
  6. Step 6: Final answer
    x = 434,952.90

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1.5x scale

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.