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Finding the Fourth Proportional to 391,810.21, 587,715.95 and 107,504.67

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Solution

The fourth proportional to 391,810.21, 587,715.95 and 107,504.67 is: 161,257.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,810.21 : 587,715.95 = 107,504.67 : x
  2. Step 2: Convert to fraction form
    391,810.21/587,715.95 = 107,504.67/x
  3. Step 3: Cross multiply
    391,810.21x = 587,715.95 × 107,504.67
  4. Step 4: Simplify right side
    391,810.21x = 63,182,208,425.28
  5. Step 5: Solve for x
    x = 63,182,208,425.28/391,810.21
  6. Step 6: Final answer
    x = 161,257.18

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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.