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Finding the Fourth Proportional to 538,489.80, 808,390.80 and 272,113.20

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Solution

The fourth proportional to 538,489.80, 808,390.80 and 272,113.20 is: 408,501.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,489.80 : 808,390.80 = 272,113.20 : x
  2. Step 2: Convert to fraction form
    538,489.80/808,390.80 = 272,113.20/x
  3. Step 3: Cross multiply
    538,489.80x = 808,390.80 × 272,113.20
  4. Step 4: Simplify right side
    538,489.80x = 219,973,807,438.56
  5. Step 5: Solve for x
    x = 219,973,807,438.56/538,489.80
  6. Step 6: Final answer
    x = 408,501.34

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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.