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Finding the Fourth Proportional to 485,586.72, 728,488.32 and 148,674.60

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Solution

The fourth proportional to 485,586.72, 728,488.32 and 148,674.60 is: 223,045.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,586.72 : 728,488.32 = 148,674.60 : x
  2. Step 2: Convert to fraction form
    485,586.72/728,488.32 = 148,674.60/x
  3. Step 3: Cross multiply
    485,586.72x = 728,488.32 × 148,674.60
  4. Step 4: Simplify right side
    485,586.72x = 108,307,709,580.67
  5. Step 5: Solve for x
    x = 108,307,709,580.67/485,586.72
  6. Step 6: Final answer
    x = 223,045.04

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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.