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Finding the Fourth Proportional to 439,745.80, 659,877.90 and 290,417.80

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Solution

The fourth proportional to 439,745.80, 659,877.90 and 290,417.80 is: 435,797.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,745.80 : 659,877.90 = 290,417.80 : x
  2. Step 2: Convert to fraction form
    439,745.80/659,877.90 = 290,417.80/x
  3. Step 3: Cross multiply
    439,745.80x = 659,877.90 × 290,417.80
  4. Step 4: Simplify right side
    439,745.80x = 191,640,287,986.62
  5. Step 5: Solve for x
    x = 191,640,287,986.62/439,745.80
  6. Step 6: Final answer
    x = 435,797.88

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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.