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Finding the Fourth Proportional to 387,396.94, 580,762.56 and 134,644.59

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Solution

The fourth proportional to 387,396.94, 580,762.56 and 134,644.59 is: 201,851.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,396.94 : 580,762.56 = 134,644.59 : x
  2. Step 2: Convert to fraction form
    387,396.94/580,762.56 = 134,644.59/x
  3. Step 3: Cross multiply
    387,396.94x = 580,762.56 × 134,644.59
  4. Step 4: Simplify right side
    387,396.94x = 78,196,533,874.74
  5. Step 5: Solve for x
    x = 78,196,533,874.74/387,396.94
  6. Step 6: Final answer
    x = 201,851.19

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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.