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Finding the Fourth Proportional to 485,377,707.80, 728,066,561.70 and 178,889,778.20

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Solution

The fourth proportional to 485,377,707.80, 728,066,561.70 and 178,889,778.20 is: 268,334,667.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,377,707.80 : 728,066,561.70 = 178,889,778.20 : x
  2. Step 2: Convert to fraction form
    485,377,707.80/728,066,561.70 = 178,889,778.20/x
  3. Step 3: Cross multiply
    485,377,707.80x = 728,066,561.70 × 178,889,778.20
  4. Step 4: Simplify right side
    485,377,707.80x = 130,243,665,737,349,616
  5. Step 5: Solve for x
    x = 130,243,665,737,349,616/485,377,707.80
  6. Step 6: Final answer
    x = 268,334,667.30

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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.