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Finding the Fourth Proportional to 443,421.70, 665,132.55 and 436,423.30

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Solution

The fourth proportional to 443,421.70, 665,132.55 and 436,423.30 is: 654,634.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,421.70 : 665,132.55 = 436,423.30 : x
  2. Step 2: Convert to fraction form
    443,421.70/665,132.55 = 436,423.30/x
  3. Step 3: Cross multiply
    443,421.70x = 665,132.55 × 436,423.30
  4. Step 4: Simplify right side
    443,421.70x = 290,279,342,408.42
  5. Step 5: Solve for x
    x = 290,279,342,408.42/443,421.70
  6. Step 6: Final answer
    x = 654,634.95

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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.