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Finding the Fourth Proportional to 666,561,672.80, 930,890,516.80 and 666,561,672.80

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Solution

The fourth proportional to 666,561,672.80, 930,890,516.80 and 666,561,672.80 is: 930,890,516.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,561,672.80 : 930,890,516.80 = 666,561,672.80 : x
  2. Step 2: Convert to fraction form
    666,561,672.80/930,890,516.80 = 666,561,672.80/x
  3. Step 3: Cross multiply
    666,561,672.80x = 930,890,516.80 × 666,561,672.80
  4. Step 4: Simplify right side
    666,561,672.80x = 620,495,940,071,864,448
  5. Step 5: Solve for x
    x = 620,495,940,071,864,448/666,561,672.80
  6. Step 6: Final answer
    x = 930,890,516.80

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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.