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Finding the Fourth Proportional to 319,688,864.70, 448,017,906.90 and 319,688,864.70

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Solution

The fourth proportional to 319,688,864.70, 448,017,906.90 and 319,688,864.70 is: 448,017,906.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,688,864.70 : 448,017,906.90 = 319,688,864.70 : x
  2. Step 2: Convert to fraction form
    319,688,864.70/448,017,906.90 = 319,688,864.70/x
  3. Step 3: Cross multiply
    319,688,864.70x = 448,017,906.90 × 319,688,864.70
  4. Step 4: Simplify right side
    319,688,864.70x = 143,226,336,022,131,280
  5. Step 5: Solve for x
    x = 143,226,336,022,131,280/319,688,864.70
  6. Step 6: Final answer
    x = 448,017,906.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.