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Finding the Fourth Proportional to 391,948.86, 587,922 and 107,639.66

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Solution

The fourth proportional to 391,948.86, 587,922 and 107,639.66 is: 161,459.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,948.86 : 587,922 = 107,639.66 : x
  2. Step 2: Convert to fraction form
    391,948.86/587,922 = 107,639.66/x
  3. Step 3: Cross multiply
    391,948.86x = 587,922 × 107,639.66
  4. Step 4: Simplify right side
    391,948.86x = 63,283,724,186.52
  5. Step 5: Solve for x
    x = 63,283,724,186.52/391,948.86
  6. Step 6: Final answer
    x = 161,459.14

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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.