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Finding the Fourth Proportional to 387,491.61, 580,999.26 and 134,713.29

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Solution

The fourth proportional to 387,491.61, 580,999.26 and 134,713.29 is: 201,987.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,491.61 : 580,999.26 = 134,713.29 : x
  2. Step 2: Convert to fraction form
    387,491.61/580,999.26 = 134,713.29/x
  3. Step 3: Cross multiply
    387,491.61x = 580,999.26 × 134,713.29
  4. Step 4: Simplify right side
    387,491.61x = 78,268,321,802.17
  5. Step 5: Solve for x
    x = 78,268,321,802.17/387,491.61
  6. Step 6: Final answer
    x = 201,987.14

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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.