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Finding the Fourth Proportional to 667,668.78, 920,880.63 and 463,719.96

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Solution

The fourth proportional to 667,668.78, 920,880.63 and 463,719.96 is: 639,584.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,668.78 : 920,880.63 = 463,719.96 : x
  2. Step 2: Convert to fraction form
    667,668.78/920,880.63 = 463,719.96/x
  3. Step 3: Cross multiply
    667,668.78x = 920,880.63 × 463,719.96
  4. Step 4: Simplify right side
    667,668.78x = 427,030,728,908.38
  5. Step 5: Solve for x
    x = 427,030,728,908.38/667,668.78
  6. Step 6: Final answer
    x = 639,584.69

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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.