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Finding the Fourth Proportional to 391,136.45, 539,723.66 and 219,030.48

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Solution

The fourth proportional to 391,136.45, 539,723.66 and 219,030.48 is: 302,237.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,136.45 : 539,723.66 = 219,030.48 : x
  2. Step 2: Convert to fraction form
    391,136.45/539,723.66 = 219,030.48/x
  3. Step 3: Cross multiply
    391,136.45x = 539,723.66 × 219,030.48
  4. Step 4: Simplify right side
    391,136.45x = 118,215,931,222.00
  5. Step 5: Solve for x
    x = 118,215,931,222.00/391,136.45
  6. Step 6: Final answer
    x = 302,237.07

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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.