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Finding the Fourth Proportional to 266,696.20, 399,266.70 and 258,920.20

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Solution

The fourth proportional to 266,696.20, 399,266.70 and 258,920.20 is: 387,625.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,696.20 : 399,266.70 = 258,920.20 : x
  2. Step 2: Convert to fraction form
    266,696.20/399,266.70 = 258,920.20/x
  3. Step 3: Cross multiply
    266,696.20x = 399,266.70 × 258,920.20
  4. Step 4: Simplify right side
    266,696.20x = 103,378,213,817.34
  5. Step 5: Solve for x
    x = 103,378,213,817.34/266,696.20
  6. Step 6: Final answer
    x = 387,625.37

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1.5x scale

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.