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Finding the Fourth Proportional to 449,632.56, 620,782.20 and 288,557.04

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Solution

The fourth proportional to 449,632.56, 620,782.20 and 288,557.04 is: 398,394.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,632.56 : 620,782.20 = 288,557.04 : x
  2. Step 2: Convert to fraction form
    449,632.56/620,782.20 = 288,557.04/x
  3. Step 3: Cross multiply
    449,632.56x = 620,782.20 × 288,557.04
  4. Step 4: Simplify right side
    449,632.56x = 179,131,074,116.69
  5. Step 5: Solve for x
    x = 179,131,074,116.69/449,632.56
  6. Step 6: Final answer
    x = 398,394.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.