Home / 642,533,669.36-886,370,132.25-419,645,819.28

Finding the Fourth Proportional to 642,533,669.36, 886,370,132.25 and 419,645,819.28

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Solution

The fourth proportional to 642,533,669.36, 886,370,132.25 and 419,645,819.28 is: 578,898,099.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,533,669.36 : 886,370,132.25 = 419,645,819.28 : x
  2. Step 2: Convert to fraction form
    642,533,669.36/886,370,132.25 = 419,645,819.28/x
  3. Step 3: Cross multiply
    642,533,669.36x = 886,370,132.25 × 419,645,819.28
  4. Step 4: Simplify right side
    642,533,669.36x = 371,961,520,331,694,784
  5. Step 5: Solve for x
    x = 371,961,520,331,694,784/642,533,669.36
  6. Step 6: Final answer
    x = 578,898,099.93

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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.