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Finding the Fourth Proportional to 320,577.30, 480,865.95 and 315,911.70

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Solution

The fourth proportional to 320,577.30, 480,865.95 and 315,911.70 is: 473,867.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,577.30 : 480,865.95 = 315,911.70 : x
  2. Step 2: Convert to fraction form
    320,577.30/480,865.95 = 315,911.70/x
  3. Step 3: Cross multiply
    320,577.30x = 480,865.95 × 315,911.70
  4. Step 4: Simplify right side
    320,577.30x = 151,911,179,736.62
  5. Step 5: Solve for x
    x = 151,911,179,736.62/320,577.30
  6. Step 6: Final answer
    x = 473,867.55

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Similar ratio
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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.