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Finding the Third Proportional to 287,891,434 and 621,657,039

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Solution

The third proportional to 287,891,434 and 621,657,039 is: 1,342,372,257.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,891,434 : 621,657,039 = 621,657,039 : x
  2. Step 2: Convert to fraction form
    287,891,434/621,657,039 = 621,657,039/x
  3. Step 3: Cross multiply
    287,891,434x = 621,657,039 × 621,657,039
  4. Step 4: Simplify right side
    287,891,434x = 386,457,474,138,247,552
  5. Step 5: Solve for x
    x = 386,457,474,138,247,552/287,891,434
  6. Step 6: Final answer
    x = 1,342,372,257.38

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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.