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Finding the Fourth Proportional to 718,995.79, 992,213.45 and 396,705.86

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Solution

The fourth proportional to 718,995.79, 992,213.45 and 396,705.86 is: 547,453.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,995.79 : 992,213.45 = 396,705.86 : x
  2. Step 2: Convert to fraction form
    718,995.79/992,213.45 = 396,705.86/x
  3. Step 3: Cross multiply
    718,995.79x = 992,213.45 × 396,705.86
  4. Step 4: Simplify right side
    718,995.79x = 393,616,889,985.82
  5. Step 5: Solve for x
    x = 393,616,889,985.82/718,995.79
  6. Step 6: Final answer
    x = 547,453.68

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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.