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Finding the Fourth Proportional to 439,435.80, 659,115.30 and 143,947.80

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Solution

The fourth proportional to 439,435.80, 659,115.30 and 143,947.80 is: 215,909.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,435.80 : 659,115.30 = 143,947.80 : x
  2. Step 2: Convert to fraction form
    439,435.80/659,115.30 = 143,947.80/x
  3. Step 3: Cross multiply
    439,435.80x = 659,115.30 × 143,947.80
  4. Step 4: Simplify right side
    439,435.80x = 94,878,197,381.34
  5. Step 5: Solve for x
    x = 94,878,197,381.34/439,435.80
  6. Step 6: Final answer
    x = 215,909.12

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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.