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Finding the Fourth Proportional to 443,718.10, 665,188.35 and 266,295.70

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Solution

The fourth proportional to 443,718.10, 665,188.35 and 266,295.70 is: 399,210.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,718.10 : 665,188.35 = 266,295.70 : x
  2. Step 2: Convert to fraction form
    443,718.10/665,188.35 = 266,295.70/x
  3. Step 3: Cross multiply
    443,718.10x = 665,188.35 × 266,295.70
  4. Step 4: Simplify right side
    443,718.10x = 177,136,797,295.10
  5. Step 5: Solve for x
    x = 177,136,797,295.10/443,718.10
  6. Step 6: Final answer
    x = 399,210.21

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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.