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Finding the Fourth Proportional to 303,430.20, 455,145.30 and 203,638.20

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Solution

The fourth proportional to 303,430.20, 455,145.30 and 203,638.20 is: 305,457.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,430.20 : 455,145.30 = 203,638.20 : x
  2. Step 2: Convert to fraction form
    303,430.20/455,145.30 = 203,638.20/x
  3. Step 3: Cross multiply
    303,430.20x = 455,145.30 × 203,638.20
  4. Step 4: Simplify right side
    303,430.20x = 92,684,969,630.46
  5. Step 5: Solve for x
    x = 92,684,969,630.46/303,430.20
  6. Step 6: Final answer
    x = 305,457.30

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1.5x scale

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.