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Finding the Fourth Proportional to 874,478.72, 1,206,784.64 and 492,512

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Solution

The fourth proportional to 874,478.72, 1,206,784.64 and 492,512 is: 679,668.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,478.72 : 1,206,784.64 = 492,512 : x
  2. Step 2: Convert to fraction form
    874,478.72/1,206,784.64 = 492,512/x
  3. Step 3: Cross multiply
    874,478.72x = 1,206,784.64 × 492,512
  4. Step 4: Simplify right side
    874,478.72x = 594,355,916,615.68
  5. Step 5: Solve for x
    x = 594,355,916,615.68/874,478.72
  6. Step 6: Final answer
    x = 679,668.82

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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.