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Finding the Fourth Proportional to 429,236,492.80, 643,854,739.20 and 429,236,492.80

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Solution

The fourth proportional to 429,236,492.80, 643,854,739.20 and 429,236,492.80 is: 643,854,739.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,236,492.80 : 643,854,739.20 = 429,236,492.80 : x
  2. Step 2: Convert to fraction form
    429,236,492.80/643,854,739.20 = 429,236,492.80/x
  3. Step 3: Cross multiply
    429,236,492.80x = 643,854,739.20 × 429,236,492.80
  4. Step 4: Simplify right side
    429,236,492.80x = 276,365,950,126,866,720
  5. Step 5: Solve for x
    x = 276,365,950,126,866,720/429,236,492.80
  6. Step 6: Final answer
    x = 643,854,739.20

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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.