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Finding the Fourth Proportional to 347,630, 479,729.40 and 188,654

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Solution

The fourth proportional to 347,630, 479,729.40 and 188,654 is: 260,342.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,630 : 479,729.40 = 188,654 : x
  2. Step 2: Convert to fraction form
    347,630/479,729.40 = 188,654/x
  3. Step 3: Cross multiply
    347,630x = 479,729.40 × 188,654
  4. Step 4: Simplify right side
    347,630x = 90,502,870,227.60
  5. Step 5: Solve for x
    x = 90,502,870,227.60/347,630
  6. Step 6: Final answer
    x = 260,342.52

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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.