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Finding the Fourth Proportional to 443,347.80, 665,021.70 and 303,379.80

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Solution

The fourth proportional to 443,347.80, 665,021.70 and 303,379.80 is: 455,069.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,347.80 : 665,021.70 = 303,379.80 : x
  2. Step 2: Convert to fraction form
    443,347.80/665,021.70 = 303,379.80/x
  3. Step 3: Cross multiply
    443,347.80x = 665,021.70 × 303,379.80
  4. Step 4: Simplify right side
    443,347.80x = 201,754,150,341.66
  5. Step 5: Solve for x
    x = 201,754,150,341.66/443,347.80
  6. Step 6: Final answer
    x = 455,069.70

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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.