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Finding the Fourth Proportional to 387,344.97, 581,111.15 and 134,588.81

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Solution

The fourth proportional to 387,344.97, 581,111.15 and 134,588.81 is: 201,915.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,344.97 : 581,111.15 = 134,588.81 : x
  2. Step 2: Convert to fraction form
    387,344.97/581,111.15 = 134,588.81/x
  3. Step 3: Cross multiply
    387,344.97x = 581,111.15 × 134,588.81
  4. Step 4: Simplify right side
    387,344.97x = 78,211,058,936.07
  5. Step 5: Solve for x
    x = 78,211,058,936.07/387,344.97
  6. Step 6: Final answer
    x = 201,915.77

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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.