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Finding the Fourth Proportional to 704,958,530.65, 972,784,299.14 and 387,402,079.03

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Solution

The fourth proportional to 704,958,530.65, 972,784,299.14 and 387,402,079.03 is: 534,582,735.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,958,530.65 : 972,784,299.14 = 387,402,079.03 : x
  2. Step 2: Convert to fraction form
    704,958,530.65/972,784,299.14 = 387,402,079.03/x
  3. Step 3: Cross multiply
    704,958,530.65x = 972,784,299.14 × 387,402,079.03
  4. Step 4: Simplify right side
    704,958,530.65x = 376,858,659,934,577,408
  5. Step 5: Solve for x
    x = 376,858,659,934,577,408/704,958,530.65
  6. Step 6: Final answer
    x = 534,582,735.79

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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.