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Finding the Fourth Proportional to 545,576.30, 820,114.05 and 388,889.90

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Solution

The fourth proportional to 545,576.30, 820,114.05 and 388,889.90 is: 584,581.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,576.30 : 820,114.05 = 388,889.90 : x
  2. Step 2: Convert to fraction form
    545,576.30/820,114.05 = 388,889.90/x
  3. Step 3: Cross multiply
    545,576.30x = 820,114.05 × 388,889.90
  4. Step 4: Simplify right side
    545,576.30x = 318,934,070,893.10
  5. Step 5: Solve for x
    x = 318,934,070,893.10/545,576.30
  6. Step 6: Final answer
    x = 584,581.97

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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.