Home / 429,312,080.80-643,968,121.20-399,078,992.80

Finding the Fourth Proportional to 429,312,080.80, 643,968,121.20 and 399,078,992.80

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Solution

The fourth proportional to 429,312,080.80, 643,968,121.20 and 399,078,992.80 is: 598,618,489.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,312,080.80 : 643,968,121.20 = 399,078,992.80 : x
  2. Step 2: Convert to fraction form
    429,312,080.80/643,968,121.20 = 399,078,992.80/x
  3. Step 3: Cross multiply
    429,312,080.80x = 643,968,121.20 × 399,078,992.80
  4. Step 4: Simplify right side
    429,312,080.80x = 256,994,149,203,804,352
  5. Step 5: Solve for x
    x = 256,994,149,203,804,352/429,312,080.80
  6. Step 6: Final answer
    x = 598,618,489.20

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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.