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Finding the Fourth Proportional to 578,644,421.50, 798,529,612.71 and 317,900,833.66

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Solution

The fourth proportional to 578,644,421.50, 798,529,612.71 and 317,900,833.66 is: 438,703,321.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,644,421.50 : 798,529,612.71 = 317,900,833.66 : x
  2. Step 2: Convert to fraction form
    578,644,421.50/798,529,612.71 = 317,900,833.66/x
  3. Step 3: Cross multiply
    578,644,421.50x = 798,529,612.71 × 317,900,833.66
  4. Step 4: Simplify right side
    578,644,421.50x = 253,853,229,582,705,952
  5. Step 5: Solve for x
    x = 253,853,229,582,705,952/578,644,421.50
  6. Step 6: Final answer
    x = 438,703,321.33

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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.