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Finding the Fourth Proportional to 443,271.38, 665,000.48 and 143,728.61

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Solution

The fourth proportional to 443,271.38, 665,000.48 and 143,728.61 is: 215,623.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,271.38 : 665,000.48 = 143,728.61 : x
  2. Step 2: Convert to fraction form
    443,271.38/665,000.48 = 143,728.61/x
  3. Step 3: Cross multiply
    443,271.38x = 665,000.48 × 143,728.61
  4. Step 4: Simplify right side
    443,271.38x = 95,579,590,596.09
  5. Step 5: Solve for x
    x = 95,579,590,596.09/443,271.38
  6. Step 6: Final answer
    x = 215,623.20

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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.