Home / 391,293,263.31-539,977,438.98-215,077,491.56

Finding the Fourth Proportional to 391,293,263.31, 539,977,438.98 and 215,077,491.56

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Solution

The fourth proportional to 391,293,263.31, 539,977,438.98 and 215,077,491.56 is: 296,802,945.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,293,263.31 : 539,977,438.98 = 215,077,491.56 : x
  2. Step 2: Convert to fraction form
    391,293,263.31/539,977,438.98 = 215,077,491.56/x
  3. Step 3: Cross multiply
    391,293,263.31x = 539,977,438.98 × 215,077,491.56
  4. Step 4: Simplify right side
    391,293,263.31x = 116,136,993,072,111,488
  5. Step 5: Solve for x
    x = 116,136,993,072,111,488/391,293,263.31
  6. Step 6: Final answer
    x = 296,802,945.42

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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.