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Finding the Fourth Proportional to 485,424,136.80, 728,136,205.20 and 162,308,008.80

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Solution

The fourth proportional to 485,424,136.80, 728,136,205.20 and 162,308,008.80 is: 243,462,013.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,424,136.80 : 728,136,205.20 = 162,308,008.80 : x
  2. Step 2: Convert to fraction form
    485,424,136.80/728,136,205.20 = 162,308,008.80/x
  3. Step 3: Cross multiply
    485,424,136.80x = 728,136,205.20 × 162,308,008.80
  4. Step 4: Simplify right side
    485,424,136.80x = 118,182,337,601,200,224
  5. Step 5: Solve for x
    x = 118,182,337,601,200,224/485,424,136.80
  6. Step 6: Final answer
    x = 243,462,013.20

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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.