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Finding the Fourth Proportional to 538,811.50, 808,221.30 and 239,211.40

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Solution

The fourth proportional to 538,811.50, 808,221.30 and 239,211.40 is: 358,818.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,811.50 : 808,221.30 = 239,211.40 : x
  2. Step 2: Convert to fraction form
    538,811.50/808,221.30 = 239,211.40/x
  3. Step 3: Cross multiply
    538,811.50x = 808,221.30 × 239,211.40
  4. Step 4: Simplify right side
    538,811.50x = 193,335,748,682.82
  5. Step 5: Solve for x
    x = 193,335,748,682.82/538,811.50
  6. Step 6: Final answer
    x = 358,818.90

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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.