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Finding the Fourth Proportional to 485,550,908.40, 728,074,420.20 and 178,685,065.20

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Solution

The fourth proportional to 485,550,908.40, 728,074,420.20 and 178,685,065.20 is: 267,934,881.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,550,908.40 : 728,074,420.20 = 178,685,065.20 : x
  2. Step 2: Convert to fraction form
    485,550,908.40/728,074,420.20 = 178,685,065.20/x
  3. Step 3: Cross multiply
    485,550,908.40x = 728,074,420.20 × 178,685,065.20
  4. Step 4: Simplify right side
    485,550,908.40x = 130,096,025,243,889,200
  5. Step 5: Solve for x
    x = 130,096,025,243,889,200/485,550,908.40
  6. Step 6: Final answer
    x = 267,934,881.79

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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.