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Finding the Fourth Proportional to 665,184.32, 917,940.32 and 378,700.32

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Solution

The fourth proportional to 665,184.32, 917,940.32 and 378,700.32 is: 522,598.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,184.32 : 917,940.32 = 378,700.32 : x
  2. Step 2: Convert to fraction form
    665,184.32/917,940.32 = 378,700.32/x
  3. Step 3: Cross multiply
    665,184.32x = 917,940.32 × 378,700.32
  4. Step 4: Simplify right side
    665,184.32x = 347,624,292,924.90
  5. Step 5: Solve for x
    x = 347,624,292,924.90/665,184.32
  6. Step 6: Final answer
    x = 522,598.45

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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.