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Finding the Fourth Proportional to 665,330.16, 918,164.39 and 378,851.39

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Solution

The fourth proportional to 665,330.16, 918,164.39 and 378,851.39 is: 522,819.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,330.16 : 918,164.39 = 378,851.39 : x
  2. Step 2: Convert to fraction form
    665,330.16/918,164.39 = 378,851.39/x
  3. Step 3: Cross multiply
    665,330.16x = 918,164.39 × 378,851.39
  4. Step 4: Simplify right side
    665,330.16x = 347,847,848,914.92
  5. Step 5: Solve for x
    x = 347,847,848,914.92/665,330.16
  6. Step 6: Final answer
    x = 522,819.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.