Home / 1,217,998,517.92-1,680,839,798.16-661,081,766.56

Finding the Fourth Proportional to 1,217,998,517.92, 1,680,839,798.16 and 661,081,766.56

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Solution

The fourth proportional to 1,217,998,517.92, 1,680,839,798.16 and 661,081,766.56 is: 912,293,838.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217,998,517.92 : 1,680,839,798.16 = 661,081,766.56 : x
  2. Step 2: Convert to fraction form
    1,217,998,517.92/1,680,839,798.16 = 661,081,766.56/x
  3. Step 3: Cross multiply
    1,217,998,517.92x = 1,680,839,798.16 × 661,081,766.56
  4. Step 4: Simplify right side
    1,217,998,517.92x = 1,111,172,543,071,966,592
  5. Step 5: Solve for x
    x = 1,111,172,543,071,966,592/1,217,998,517.92
  6. Step 6: Final answer
    x = 912,293,838.39

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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.