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Finding the Fourth Proportional to 678,613.36, 936,528.64 and 376,809.52

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Solution

The fourth proportional to 678,613.36, 936,528.64 and 376,809.52 is: 520,020.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,613.36 : 936,528.64 = 376,809.52 : x
  2. Step 2: Convert to fraction form
    678,613.36/936,528.64 = 376,809.52/x
  3. Step 3: Cross multiply
    678,613.36x = 936,528.64 × 376,809.52
  4. Step 4: Simplify right side
    678,613.36x = 352,892,907,304.65
  5. Step 5: Solve for x
    x = 352,892,907,304.65/678,613.36
  6. Step 6: Final answer
    x = 520,020.57

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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.