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Finding the Fourth Proportional to 399,474.32, 550,516.68 and 286,100.24

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Solution

The fourth proportional to 399,474.32, 550,516.68 and 286,100.24 is: 394,275.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,474.32 : 550,516.68 = 286,100.24 : x
  2. Step 2: Convert to fraction form
    399,474.32/550,516.68 = 286,100.24/x
  3. Step 3: Cross multiply
    399,474.32x = 550,516.68 × 286,100.24
  4. Step 4: Simplify right side
    399,474.32x = 157,502,954,272.00
  5. Step 5: Solve for x
    x = 157,502,954,272.00/399,474.32
  6. Step 6: Final answer
    x = 394,275.54

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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.