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Finding the Fourth Proportional to 379,605.45, 523,830.59 and 218,434.49

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Solution

The fourth proportional to 379,605.45, 523,830.59 and 218,434.49 is: 301,425.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,605.45 : 523,830.59 = 218,434.49 : x
  2. Step 2: Convert to fraction form
    379,605.45/523,830.59 = 218,434.49/x
  3. Step 3: Cross multiply
    379,605.45x = 523,830.59 × 218,434.49
  4. Step 4: Simplify right side
    379,605.45x = 114,422,668,073.91
  5. Step 5: Solve for x
    x = 114,422,668,073.91/379,605.45
  6. Step 6: Final answer
    x = 301,425.25

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1.5x scale

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.