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Finding the Fourth Proportional to 713,633.72, 984,828.04 and 391,324.59

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Solution

The fourth proportional to 713,633.72, 984,828.04 and 391,324.59 is: 540,035.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,633.72 : 984,828.04 = 391,324.59 : x
  2. Step 2: Convert to fraction form
    713,633.72/984,828.04 = 391,324.59/x
  3. Step 3: Cross multiply
    713,633.72x = 984,828.04 × 391,324.59
  4. Step 4: Simplify right side
    713,633.72x = 385,387,427,995.19
  5. Step 5: Solve for x
    x = 385,387,427,995.19/713,633.72
  6. Step 6: Final answer
    x = 540,035.34

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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.