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Finding the Fourth Proportional to 439,813.70, 659,720.55 and 140,316.20

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Solution

The fourth proportional to 439,813.70, 659,720.55 and 140,316.20 is: 210,474.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,813.70 : 659,720.55 = 140,316.20 : x
  2. Step 2: Convert to fraction form
    439,813.70/659,720.55 = 140,316.20/x
  3. Step 3: Cross multiply
    439,813.70x = 659,720.55 × 140,316.20
  4. Step 4: Simplify right side
    439,813.70x = 92,569,480,637.91
  5. Step 5: Solve for x
    x = 92,569,480,637.91/439,813.70
  6. Step 6: Final answer
    x = 210,474.30

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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.