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Finding the Fourth Proportional to 393,417,073.80, 551,590,119 and 393,417,073.80

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Solution

The fourth proportional to 393,417,073.80, 551,590,119 and 393,417,073.80 is: 551,590,119

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,417,073.80 : 551,590,119 = 393,417,073.80 : x
  2. Step 2: Convert to fraction form
    393,417,073.80/551,590,119 = 393,417,073.80/x
  3. Step 3: Cross multiply
    393,417,073.80x = 551,590,119 × 393,417,073.80
  4. Step 4: Simplify right side
    393,417,073.80x = 217,004,970,553,973,792
  5. Step 5: Solve for x
    x = 217,004,970,553,973,792/393,417,073.80
  6. Step 6: Final answer
    x = 551,590,119

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.