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Finding the Fourth Proportional to 538,920.40, 807,214.20 and 289,310.80

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Solution

The fourth proportional to 538,920.40, 807,214.20 and 289,310.80 is: 433,340.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,920.40 : 807,214.20 = 289,310.80 : x
  2. Step 2: Convert to fraction form
    538,920.40/807,214.20 = 289,310.80/x
  3. Step 3: Cross multiply
    538,920.40x = 807,214.20 × 289,310.80
  4. Step 4: Simplify right side
    538,920.40x = 233,535,785,973.36
  5. Step 5: Solve for x
    x = 233,535,785,973.36/538,920.40
  6. Step 6: Final answer
    x = 433,340.04

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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.