Home / 391,459,850.12-539,713,112.65-320,634,544.03

Finding the Fourth Proportional to 391,459,850.12, 539,713,112.65 and 320,634,544.03

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Solution

The fourth proportional to 391,459,850.12, 539,713,112.65 and 320,634,544.03 is: 442,064,921.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,459,850.12 : 539,713,112.65 = 320,634,544.03 : x
  2. Step 2: Convert to fraction form
    391,459,850.12/539,713,112.65 = 320,634,544.03/x
  3. Step 3: Cross multiply
    391,459,850.12x = 539,713,112.65 × 320,634,544.03
  4. Step 4: Simplify right side
    391,459,850.12x = 173,050,667,779,393,888
  5. Step 5: Solve for x
    x = 173,050,667,779,393,888/391,459,850.12
  6. Step 6: Final answer
    x = 442,064,921.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.