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Finding the Fourth Proportional to 3,078,934.05, 4,619,053.08 and 920,127.21

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Solution

The fourth proportional to 3,078,934.05, 4,619,053.08 and 920,127.21 is: 1,380,385.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078,934.05 : 4,619,053.08 = 920,127.21 : x
  2. Step 2: Convert to fraction form
    3,078,934.05/4,619,053.08 = 920,127.21/x
  3. Step 3: Cross multiply
    3,078,934.05x = 4,619,053.08 × 920,127.21
  4. Step 4: Simplify right side
    3,078,934.05x = 4,250,116,423,342.31
  5. Step 5: Solve for x
    x = 4,250,116,423,342.31/3,078,934.05
  6. Step 6: Final answer
    x = 1,380,385.66

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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.