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Finding the Third Proportional to 287,890,685 and 621,654,928

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Solution

The third proportional to 287,890,685 and 621,654,928 is: 1,342,366,633.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,890,685 : 621,654,928 = 621,654,928 : x
  2. Step 2: Convert to fraction form
    287,890,685/621,654,928 = 621,654,928/x
  3. Step 3: Cross multiply
    287,890,685x = 621,654,928 × 621,654,928
  4. Step 4: Simplify right side
    287,890,685x = 386,454,849,506,685,184
  5. Step 5: Solve for x
    x = 386,454,849,506,685,184/287,890,685
  6. Step 6: Final answer
    x = 1,342,366,633.04

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.