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Finding the Fourth Proportional to 443,840.10, 665,371.35 and 266,417.70

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Solution

The fourth proportional to 443,840.10, 665,371.35 and 266,417.70 is: 399,393.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,840.10 : 665,371.35 = 266,417.70 : x
  2. Step 2: Convert to fraction form
    443,840.10/665,371.35 = 266,417.70/x
  3. Step 3: Cross multiply
    443,840.10x = 665,371.35 × 266,417.70
  4. Step 4: Simplify right side
    443,840.10x = 177,266,704,712.90
  5. Step 5: Solve for x
    x = 177,266,704,712.90/443,840.10
  6. Step 6: Final answer
    x = 399,393.17

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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.