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Finding the Fourth Proportional to 664,809.80, 996,566.70 and 380,208.20

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Solution

The fourth proportional to 664,809.80, 996,566.70 and 380,208.20 is: 569,941.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,809.80 : 996,566.70 = 380,208.20 : x
  2. Step 2: Convert to fraction form
    664,809.80/996,566.70 = 380,208.20/x
  3. Step 3: Cross multiply
    664,809.80x = 996,566.70 × 380,208.20
  4. Step 4: Simplify right side
    664,809.80x = 378,902,831,186.94
  5. Step 5: Solve for x
    x = 378,902,831,186.94/664,809.80
  6. Step 6: Final answer
    x = 569,941.71

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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.