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Finding the Fourth Proportional to 680,084.64, 938,501.64 and 393,598.98

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Solution

The fourth proportional to 680,084.64, 938,501.64 and 393,598.98 is: 543,157.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,084.64 : 938,501.64 = 393,598.98 : x
  2. Step 2: Convert to fraction form
    680,084.64/938,501.64 = 393,598.98/x
  3. Step 3: Cross multiply
    680,084.64x = 938,501.64 × 393,598.98
  4. Step 4: Simplify right side
    680,084.64x = 369,393,288,232.33
  5. Step 5: Solve for x
    x = 369,393,288,232.33/680,084.64
  6. Step 6: Final answer
    x = 543,157.82

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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.