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Finding the Fourth Proportional to 349,986.76, 525,234.78 and 139,684.84

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Solution

The fourth proportional to 349,986.76, 525,234.78 and 139,684.84 is: 209,628.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    349,986.76 : 525,234.78 = 139,684.84 : x
  2. Step 2: Convert to fraction form
    349,986.76/525,234.78 = 139,684.84/x
  3. Step 3: Cross multiply
    349,986.76x = 525,234.78 × 139,684.84
  4. Step 4: Simplify right side
    349,986.76x = 73,367,336,206.74
  5. Step 5: Solve for x
    x = 73,367,336,206.74/349,986.76
  6. Step 6: Final answer
    x = 209,628.89

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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.