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Finding the Fourth Proportional to 485,424,019.60, 728,136,029.40 and 162,307,891.60

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Solution

The fourth proportional to 485,424,019.60, 728,136,029.40 and 162,307,891.60 is: 243,461,837.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,424,019.60 : 728,136,029.40 = 162,307,891.60 : x
  2. Step 2: Convert to fraction form
    485,424,019.60/728,136,029.40 = 162,307,891.60/x
  3. Step 3: Cross multiply
    485,424,019.60x = 728,136,029.40 × 162,307,891.60
  4. Step 4: Simplify right side
    485,424,019.60x = 118,182,223,729,909,600
  5. Step 5: Solve for x
    x = 118,182,223,729,909,600/485,424,019.60
  6. Step 6: Final answer
    x = 243,461,837.40

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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.