Home / 391,459,845.38-539,713,106.08-320,634,539.28

Finding the Fourth Proportional to 391,459,845.38, 539,713,106.08 and 320,634,539.28

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Solution

The fourth proportional to 391,459,845.38, 539,713,106.08 and 320,634,539.28 is: 442,064,914.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,459,845.38 : 539,713,106.08 = 320,634,539.28 : x
  2. Step 2: Convert to fraction form
    391,459,845.38/539,713,106.08 = 320,634,539.28/x
  3. Step 3: Cross multiply
    391,459,845.38x = 539,713,106.08 × 320,634,539.28
  4. Step 4: Simplify right side
    391,459,845.38x = 173,050,663,111,338,560
  5. Step 5: Solve for x
    x = 173,050,663,111,338,560/391,459,845.38
  6. Step 6: Final answer
    x = 442,064,914.58

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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.