Home / 320,519,995.20-480,779,992.80-199,587,643.20

Finding the Fourth Proportional to 320,519,995.20, 480,779,992.80 and 199,587,643.20

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Solution

The fourth proportional to 320,519,995.20, 480,779,992.80 and 199,587,643.20 is: 299,381,464.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,519,995.20 : 480,779,992.80 = 199,587,643.20 : x
  2. Step 2: Convert to fraction form
    320,519,995.20/480,779,992.80 = 199,587,643.20/x
  3. Step 3: Cross multiply
    320,519,995.20x = 480,779,992.80 × 199,587,643.20
  4. Step 4: Simplify right side
    320,519,995.20x = 95,957,745,660,664,960
  5. Step 5: Solve for x
    x = 95,957,745,660,664,960/320,519,995.20
  6. Step 6: Final answer
    x = 299,381,464.80

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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.