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Finding the Third Proportional to 298,411,926 and 642,173,500

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Solution

The third proportional to 298,411,926 and 642,173,500 is: 1,381,938,080.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,411,926 : 642,173,500 = 642,173,500 : x
  2. Step 2: Convert to fraction form
    298,411,926/642,173,500 = 642,173,500/x
  3. Step 3: Cross multiply
    298,411,926x = 642,173,500 × 642,173,500
  4. Step 4: Simplify right side
    298,411,926x = 412,386,804,102,249,984
  5. Step 5: Solve for x
    x = 412,386,804,102,249,984/298,411,926
  6. Step 6: Final answer
    x = 1,381,938,080.12

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.