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Finding the Fourth Proportional to 704,958,528.40, 972,784,296.03 and 387,402,076.78

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Solution

The fourth proportional to 704,958,528.40, 972,784,296.03 and 387,402,076.78 is: 534,582,732.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,958,528.40 : 972,784,296.03 = 387,402,076.78 : x
  2. Step 2: Convert to fraction form
    704,958,528.40/972,784,296.03 = 387,402,076.78/x
  3. Step 3: Cross multiply
    704,958,528.40x = 972,784,296.03 × 387,402,076.78
  4. Step 4: Simplify right side
    704,958,528.40x = 376,858,656,540,992,256
  5. Step 5: Solve for x
    x = 376,858,656,540,992,256/704,958,528.40
  6. Step 6: Final answer
    x = 534,582,732.68

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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.