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Finding the Fourth Proportional to 538,962,421.80, 806,931,978.30 and 523,845,877.80

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Solution

The fourth proportional to 538,962,421.80, 806,931,978.30 and 523,845,877.80 is: 784,299,560.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,962,421.80 : 806,931,978.30 = 523,845,877.80 : x
  2. Step 2: Convert to fraction form
    538,962,421.80/806,931,978.30 = 523,845,877.80/x
  3. Step 3: Cross multiply
    538,962,421.80x = 806,931,978.30 × 523,845,877.80
  4. Step 4: Simplify right side
    538,962,421.80x = 422,707,990,497,454,016
  5. Step 5: Solve for x
    x = 422,707,990,497,454,016/538,962,421.80
  6. Step 6: Final answer
    x = 784,299,560.41

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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.