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Finding the Fourth Proportional to 718,601.92, 991,744.64 and 457,138.56

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Solution

The fourth proportional to 718,601.92, 991,744.64 and 457,138.56 is: 630,898.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,601.92 : 991,744.64 = 457,138.56 : x
  2. Step 2: Convert to fraction form
    718,601.92/991,744.64 = 457,138.56/x
  3. Step 3: Cross multiply
    718,601.92x = 991,744.64 × 457,138.56
  4. Step 4: Simplify right side
    718,601.92x = 453,364,716,617.32
  5. Step 5: Solve for x
    x = 453,364,716,617.32/718,601.92
  6. Step 6: Final answer
    x = 630,898.28

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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.