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Finding the Fourth Proportional to 439,487.70, 659,145.15 and 143,999.70

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Solution

The fourth proportional to 439,487.70, 659,145.15 and 143,999.70 is: 215,971.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,487.70 : 659,145.15 = 143,999.70 : x
  2. Step 2: Convert to fraction form
    439,487.70/659,145.15 = 143,999.70/x
  3. Step 3: Cross multiply
    439,487.70x = 659,145.15 × 143,999.70
  4. Step 4: Simplify right side
    439,487.70x = 94,916,703,856.46
  5. Step 5: Solve for x
    x = 94,916,703,856.46/439,487.70
  6. Step 6: Final answer
    x = 215,971.24

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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.