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Finding the Fourth Proportional to 716,168.44, 988,312.80 and 393,900.40

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Solution

The fourth proportional to 716,168.44, 988,312.80 and 393,900.40 is: 543,582.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,168.44 : 988,312.80 = 393,900.40 : x
  2. Step 2: Convert to fraction form
    716,168.44/988,312.80 = 393,900.40/x
  3. Step 3: Cross multiply
    716,168.44x = 988,312.80 × 393,900.40
  4. Step 4: Simplify right side
    716,168.44x = 389,296,807,245.12
  5. Step 5: Solve for x
    x = 389,296,807,245.12/716,168.44
  6. Step 6: Final answer
    x = 543,582.75

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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.