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Finding the Fourth Proportional to 303,420.90, 455,240.70 and 126,055.20

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Solution

The fourth proportional to 303,420.90, 455,240.70 and 126,055.20 is: 189,128.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,420.90 : 455,240.70 = 126,055.20 : x
  2. Step 2: Convert to fraction form
    303,420.90/455,240.70 = 126,055.20/x
  3. Step 3: Cross multiply
    303,420.90x = 455,240.70 × 126,055.20
  4. Step 4: Simplify right side
    303,420.90x = 57,385,457,486.64
  5. Step 5: Solve for x
    x = 57,385,457,486.64/303,420.90
  6. Step 6: Final answer
    x = 189,128.23

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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.