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Finding the Third Proportional to 129,932,559 and 288,915,989

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Solution

The third proportional to 129,932,559 and 288,915,989 is: 642,429,036.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,932,559 : 288,915,989 = 288,915,989 : x
  2. Step 2: Convert to fraction form
    129,932,559/288,915,989 = 288,915,989/x
  3. Step 3: Cross multiply
    129,932,559x = 288,915,989 × 288,915,989
  4. Step 4: Simplify right side
    129,932,559x = 83,472,448,699,848,128
  5. Step 5: Solve for x
    x = 83,472,448,699,848,128/129,932,559
  6. Step 6: Final answer
    x = 642,429,036.59

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Why These Related Problems?

These problems maintain the same ratio (2.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.