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Finding the Fourth Proportional to 514,985.36, 772,691.34 and 278,049.56

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Solution

The fourth proportional to 514,985.36, 772,691.34 and 278,049.56 is: 417,189.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    514,985.36 : 772,691.34 = 278,049.56 : x
  2. Step 2: Convert to fraction form
    514,985.36/772,691.34 = 278,049.56/x
  3. Step 3: Cross multiply
    514,985.36x = 772,691.34 × 278,049.56
  4. Step 4: Simplify right side
    514,985.36x = 214,846,487,102.81
  5. Step 5: Solve for x
    x = 214,846,487,102.81/514,985.36
  6. Step 6: Final answer
    x = 417,189.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.