Home / 391,488,828.84-540,289,011.78-215,307,867.24

Finding the Fourth Proportional to 391,488,828.84, 540,289,011.78 and 215,307,867.24

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Solution

The fourth proportional to 391,488,828.84, 540,289,011.78 and 215,307,867.24 is: 297,143,791.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,488,828.84 : 540,289,011.78 = 215,307,867.24 : x
  2. Step 2: Convert to fraction form
    391,488,828.84/540,289,011.78 = 215,307,867.24/x
  3. Step 3: Cross multiply
    391,488,828.84x = 540,289,011.78 × 215,307,867.24
  4. Step 4: Simplify right side
    391,488,828.84x = 116,328,474,819,559,040
  5. Step 5: Solve for x
    x = 116,328,474,819,559,040/391,488,828.84
  6. Step 6: Final answer
    x = 297,143,791.21

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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.