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Finding the Fourth Proportional to 443,396.80, 665,095.20 and 303,428.80

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Solution

The fourth proportional to 443,396.80, 665,095.20 and 303,428.80 is: 455,143.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,396.80 : 665,095.20 = 303,428.80 : x
  2. Step 2: Convert to fraction form
    443,396.80/665,095.20 = 303,428.80/x
  3. Step 3: Cross multiply
    443,396.80x = 665,095.20 × 303,428.80
  4. Step 4: Simplify right side
    443,396.80x = 201,809,038,421.76
  5. Step 5: Solve for x
    x = 201,809,038,421.76/443,396.80
  6. Step 6: Final answer
    x = 455,143.20

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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.