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Finding the Fourth Proportional to 320,438.80, 480,082.20 and 153,859.60

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Solution

The fourth proportional to 320,438.80, 480,082.20 and 153,859.60 is: 230,512.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,438.80 : 480,082.20 = 153,859.60 : x
  2. Step 2: Convert to fraction form
    320,438.80/480,082.20 = 153,859.60/x
  3. Step 3: Cross multiply
    320,438.80x = 480,082.20 × 153,859.60
  4. Step 4: Simplify right side
    320,438.80x = 73,865,255,259.12
  5. Step 5: Solve for x
    x = 73,865,255,259.12/320,438.80
  6. Step 6: Final answer
    x = 230,512.83

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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.