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Finding the Fourth Proportional to 558,705.63, 771,031.17 and 316,998.39

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Solution

The fourth proportional to 558,705.63, 771,031.17 and 316,998.39 is: 437,467.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,705.63 : 771,031.17 = 316,998.39 : x
  2. Step 2: Convert to fraction form
    558,705.63/771,031.17 = 316,998.39/x
  3. Step 3: Cross multiply
    558,705.63x = 771,031.17 × 316,998.39
  4. Step 4: Simplify right side
    558,705.63x = 244,415,639,529.82
  5. Step 5: Solve for x
    x = 244,415,639,529.82/558,705.63
  6. Step 6: Final answer
    x = 437,467.65

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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.