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Finding the Fourth Proportional to 463,978.79, 640,260.42 and 272,955.29

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Solution

The fourth proportional to 463,978.79, 640,260.42 and 272,955.29 is: 376,660.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    463,978.79 : 640,260.42 = 272,955.29 : x
  2. Step 2: Convert to fraction form
    463,978.79/640,260.42 = 272,955.29/x
  3. Step 3: Cross multiply
    463,978.79x = 640,260.42 × 272,955.29
  4. Step 4: Simplify right side
    463,978.79x = 174,762,468,616.62
  5. Step 5: Solve for x
    x = 174,762,468,616.62/463,978.79
  6. Step 6: Final answer
    x = 376,660.47

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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.