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Finding the Fourth Proportional to 520,538.02, 718,359.71 and 287,968.19

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Solution

The fourth proportional to 520,538.02, 718,359.71 and 287,968.19 is: 397,405.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,538.02 : 718,359.71 = 287,968.19 : x
  2. Step 2: Convert to fraction form
    520,538.02/718,359.71 = 287,968.19/x
  3. Step 3: Cross multiply
    520,538.02x = 718,359.71 × 287,968.19
  4. Step 4: Simplify right side
    520,538.02x = 206,864,740,425.99
  5. Step 5: Solve for x
    x = 206,864,740,425.99/520,538.02
  6. Step 6: Final answer
    x = 397,405.63

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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.