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Finding the Fourth Proportional to 710,006,658.74, 979,790,392.11 and 396,743,446.88

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Solution

The fourth proportional to 710,006,658.74, 979,790,392.11 and 396,743,446.88 is: 547,495,453.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,006,658.74 : 979,790,392.11 = 396,743,446.88 : x
  2. Step 2: Convert to fraction form
    710,006,658.74/979,790,392.11 = 396,743,446.88/x
  3. Step 3: Cross multiply
    710,006,658.74x = 979,790,392.11 × 396,743,446.88
  4. Step 4: Simplify right side
    710,006,658.74x = 388,725,417,385,628,160
  5. Step 5: Solve for x
    x = 388,725,417,385,628,160/710,006,658.74
  6. Step 6: Final answer
    x = 547,495,453.18

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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.