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Finding the Fourth Proportional to 591,321, 885,693.20 and 388,688.36

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Solution

The fourth proportional to 591,321, 885,693.20 and 388,688.36 is: 582,185.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    591,321 : 885,693.20 = 388,688.36 : x
  2. Step 2: Convert to fraction form
    591,321/885,693.20 = 388,688.36/x
  3. Step 3: Cross multiply
    591,321x = 885,693.20 × 388,688.36
  4. Step 4: Simplify right side
    591,321x = 344,258,637,371.15
  5. Step 5: Solve for x
    x = 344,258,637,371.15/591,321
  6. Step 6: Final answer
    x = 582,185.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.