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Finding the Fourth Proportional to 485,516.55, 728,656.20 and 336,803.34

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Solution

The fourth proportional to 485,516.55, 728,656.20 and 336,803.34 is: 505,469.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,516.55 : 728,656.20 = 336,803.34 : x
  2. Step 2: Convert to fraction form
    485,516.55/728,656.20 = 336,803.34/x
  3. Step 3: Cross multiply
    485,516.55x = 728,656.20 × 336,803.34
  4. Step 4: Simplify right side
    485,516.55x = 245,413,841,871.71
  5. Step 5: Solve for x
    x = 245,413,841,871.71/485,516.55
  6. Step 6: Final answer
    x = 505,469.57

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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.