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Finding the Fourth Proportional to 664,972.80, 996,811.20 and 380,371.20

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Solution

The fourth proportional to 664,972.80, 996,811.20 and 380,371.20 is: 570,186.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,972.80 : 996,811.20 = 380,371.20 : x
  2. Step 2: Convert to fraction form
    664,972.80/996,811.20 = 380,371.20/x
  3. Step 3: Cross multiply
    664,972.80x = 996,811.20 × 380,371.20
  4. Step 4: Simplify right side
    664,972.80x = 379,158,272,317.44
  5. Step 5: Solve for x
    x = 379,158,272,317.44/664,972.80
  6. Step 6: Final answer
    x = 570,186.14

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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.