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Finding the Fourth Proportional to 439,971.40, 658,401.90 and 300,003.40

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Solution

The fourth proportional to 439,971.40, 658,401.90 and 300,003.40 is: 448,944.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,971.40 : 658,401.90 = 300,003.40 : x
  2. Step 2: Convert to fraction form
    439,971.40/658,401.90 = 300,003.40/x
  3. Step 3: Cross multiply
    439,971.40x = 658,401.90 × 300,003.40
  4. Step 4: Simplify right side
    439,971.40x = 197,522,808,566.46
  5. Step 5: Solve for x
    x = 197,522,808,566.46/439,971.40
  6. Step 6: Final answer
    x = 448,944.66

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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.