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Finding the Fourth Proportional to 398,801.20, 598,201.80 and 286,826.80

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Solution

The fourth proportional to 398,801.20, 598,201.80 and 286,826.80 is: 430,240.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,801.20 : 598,201.80 = 286,826.80 : x
  2. Step 2: Convert to fraction form
    398,801.20/598,201.80 = 286,826.80/x
  3. Step 3: Cross multiply
    398,801.20x = 598,201.80 × 286,826.80
  4. Step 4: Simplify right side
    398,801.20x = 171,580,308,048.24
  5. Step 5: Solve for x
    x = 171,580,308,048.24/398,801.20
  6. Step 6: Final answer
    x = 430,240.20

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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.