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Finding the Fourth Proportional to 664,499,978.40, 917,019,591.12 and 367,149,061.92

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Solution

The fourth proportional to 664,499,978.40, 917,019,591.12 and 367,149,061.92 is: 506,671,021.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,499,978.40 : 917,019,591.12 = 367,149,061.92 : x
  2. Step 2: Convert to fraction form
    664,499,978.40/917,019,591.12 = 367,149,061.92/x
  3. Step 3: Cross multiply
    664,499,978.40x = 917,019,591.12 × 367,149,061.92
  4. Step 4: Simplify right side
    664,499,978.40x = 336,682,882,641,969,984
  5. Step 5: Solve for x
    x = 336,682,882,641,969,984/664,499,978.40
  6. Step 6: Final answer
    x = 506,671,021.20

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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.