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Finding the Fourth Proportional to 603,375.60, 832,420.25 and 388,640.30

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Solution

The fourth proportional to 603,375.60, 832,420.25 and 388,640.30 is: 536,170.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,375.60 : 832,420.25 = 388,640.30 : x
  2. Step 2: Convert to fraction form
    603,375.60/832,420.25 = 388,640.30/x
  3. Step 3: Cross multiply
    603,375.60x = 832,420.25 × 388,640.30
  4. Step 4: Simplify right side
    603,375.60x = 323,512,055,617.15
  5. Step 5: Solve for x
    x = 323,512,055,617.15/603,375.60
  6. Step 6: Final answer
    x = 536,170.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.