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Finding the Fourth Proportional to 704,958,530.90, 972,784,299.49 and 387,402,079.28

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Solution

The fourth proportional to 704,958,530.90, 972,784,299.49 and 387,402,079.28 is: 534,582,736.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,958,530.90 : 972,784,299.49 = 387,402,079.28 : x
  2. Step 2: Convert to fraction form
    704,958,530.90/972,784,299.49 = 387,402,079.28/x
  3. Step 3: Cross multiply
    704,958,530.90x = 972,784,299.49 × 387,402,079.28
  4. Step 4: Simplify right side
    704,958,530.90x = 376,858,660,311,427,200
  5. Step 5: Solve for x
    x = 376,858,660,311,427,200/704,958,530.90
  6. Step 6: Final answer
    x = 534,582,736.14

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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.