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Finding the Fourth Proportional to 485,365.53, 728,048.32 and 148,406.21

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Solution

The fourth proportional to 485,365.53, 728,048.32 and 148,406.21 is: 222,609.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,365.53 : 728,048.32 = 148,406.21 : x
  2. Step 2: Convert to fraction form
    485,365.53/728,048.32 = 148,406.21/x
  3. Step 3: Cross multiply
    485,365.53x = 728,048.32 × 148,406.21
  4. Step 4: Simplify right side
    485,365.53x = 108,046,890,586.99
  5. Step 5: Solve for x
    x = 108,046,890,586.99/485,365.53
  6. Step 6: Final answer
    x = 222,609.32

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1.5x scale

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.