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Finding the Fourth Proportional to 387,100.50, 580,733.70 and 134,389

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Solution

The fourth proportional to 387,100.50, 580,733.70 and 134,389 is: 201,612.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,100.50 : 580,733.70 = 134,389 : x
  2. Step 2: Convert to fraction form
    387,100.50/580,733.70 = 134,389/x
  3. Step 3: Cross multiply
    387,100.50x = 580,733.70 × 134,389
  4. Step 4: Simplify right side
    387,100.50x = 78,044,221,209.30
  5. Step 5: Solve for x
    x = 78,044,221,209.30/387,100.50
  6. Step 6: Final answer
    x = 201,612.30

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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.