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Finding the Fourth Proportional to 485,423,999.60, 728,135,999.40 and 162,307,871.60

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Solution

The fourth proportional to 485,423,999.60, 728,135,999.40 and 162,307,871.60 is: 243,461,807.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,423,999.60 : 728,135,999.40 = 162,307,871.60 : x
  2. Step 2: Convert to fraction form
    485,423,999.60/728,135,999.40 = 162,307,871.60/x
  3. Step 3: Cross multiply
    485,423,999.60x = 728,135,999.40 × 162,307,871.60
  4. Step 4: Simplify right side
    485,423,999.60x = 118,182,204,297,952,864
  5. Step 5: Solve for x
    x = 118,182,204,297,952,864/485,423,999.60
  6. Step 6: Final answer
    x = 243,461,807.40

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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.