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Finding the Fourth Proportional to 443,510.70, 665,266.05 and 218,905.80

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Solution

The fourth proportional to 443,510.70, 665,266.05 and 218,905.80 is: 328,358.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,510.70 : 665,266.05 = 218,905.80 : x
  2. Step 2: Convert to fraction form
    443,510.70/665,266.05 = 218,905.80/x
  3. Step 3: Cross multiply
    443,510.70x = 665,266.05 × 218,905.80
  4. Step 4: Simplify right side
    443,510.70x = 145,630,596,888.09
  5. Step 5: Solve for x
    x = 145,630,596,888.09/443,510.70
  6. Step 6: Final answer
    x = 328,358.70

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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.