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Finding the Fourth Proportional to 391,427.40, 587,141.10 and 251,459.40

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Solution

The fourth proportional to 391,427.40, 587,141.10 and 251,459.40 is: 377,189.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,427.40 : 587,141.10 = 251,459.40 : x
  2. Step 2: Convert to fraction form
    391,427.40/587,141.10 = 251,459.40/x
  3. Step 3: Cross multiply
    391,427.40x = 587,141.10 × 251,459.40
  4. Step 4: Simplify right side
    391,427.40x = 147,642,148,721.34
  5. Step 5: Solve for x
    x = 147,642,148,721.34/391,427.40
  6. Step 6: Final answer
    x = 377,189.10

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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.