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Finding the Fourth Proportional to 320,008.20, 480,012.30 and 142,600.20

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Solution

The fourth proportional to 320,008.20, 480,012.30 and 142,600.20 is: 213,900.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,008.20 : 480,012.30 = 142,600.20 : x
  2. Step 2: Convert to fraction form
    320,008.20/480,012.30 = 142,600.20/x
  3. Step 3: Cross multiply
    320,008.20x = 480,012.30 × 142,600.20
  4. Step 4: Simplify right side
    320,008.20x = 68,449,849,982.46
  5. Step 5: Solve for x
    x = 68,449,849,982.46/320,008.20
  6. Step 6: Final answer
    x = 213,900.30

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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.