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Finding the Fourth Proportional to 409,653,318.80, 614,479,978.20 and 409,653,318.80

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Solution

The fourth proportional to 409,653,318.80, 614,479,978.20 and 409,653,318.80 is: 614,479,978.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,653,318.80 : 614,479,978.20 = 409,653,318.80 : x
  2. Step 2: Convert to fraction form
    409,653,318.80/614,479,978.20 = 409,653,318.80/x
  3. Step 3: Cross multiply
    409,653,318.80x = 614,479,978.20 × 409,653,318.80
  4. Step 4: Simplify right side
    409,653,318.80x = 251,723,762,405,781,664
  5. Step 5: Solve for x
    x = 251,723,762,405,781,664/409,653,318.80
  6. Step 6: Final answer
    x = 614,479,978.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.