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Finding the Fourth Proportional to 266,069,672.40, 399,104,508.60 and 192,943,390.80

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Solution

The fourth proportional to 266,069,672.40, 399,104,508.60 and 192,943,390.80 is: 289,415,086.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,069,672.40 : 399,104,508.60 = 192,943,390.80 : x
  2. Step 2: Convert to fraction form
    266,069,672.40/399,104,508.60 = 192,943,390.80/x
  3. Step 3: Cross multiply
    266,069,672.40x = 399,104,508.60 × 192,943,390.80
  4. Step 4: Simplify right side
    266,069,672.40x = 77,004,577,172,851,776
  5. Step 5: Solve for x
    x = 77,004,577,172,851,776/266,069,672.40
  6. Step 6: Final answer
    x = 289,415,086.20

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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.