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Finding the Fourth Proportional to 556,275,753.90, 834,413,630.85 and 405,280,809.90

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Solution

The fourth proportional to 556,275,753.90, 834,413,630.85 and 405,280,809.90 is: 607,921,214.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,275,753.90 : 834,413,630.85 = 405,280,809.90 : x
  2. Step 2: Convert to fraction form
    556,275,753.90/834,413,630.85 = 405,280,809.90/x
  3. Step 3: Cross multiply
    556,275,753.90x = 834,413,630.85 × 405,280,809.90
  4. Step 4: Simplify right side
    556,275,753.90x = 338,171,832,102,487,616
  5. Step 5: Solve for x
    x = 338,171,832,102,487,616/556,275,753.90
  6. Step 6: Final answer
    x = 607,921,214.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.