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Finding the Fourth Proportional to 213,192,006.40, 319,788,009.60 and 213,192,006.40

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Solution

The fourth proportional to 213,192,006.40, 319,788,009.60 and 213,192,006.40 is: 319,788,009.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,192,006.40 : 319,788,009.60 = 213,192,006.40 : x
  2. Step 2: Convert to fraction form
    213,192,006.40/319,788,009.60 = 213,192,006.40/x
  3. Step 3: Cross multiply
    213,192,006.40x = 319,788,009.60 × 213,192,006.40
  4. Step 4: Simplify right side
    213,192,006.40x = 68,176,247,389,286,472
  5. Step 5: Solve for x
    x = 68,176,247,389,286,472/213,192,006.40
  6. Step 6: Final answer
    x = 319,788,009.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.