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Finding the Fourth Proportional to 538,807.50, 808,215.30 and 239,207.40

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Solution

The fourth proportional to 538,807.50, 808,215.30 and 239,207.40 is: 358,812.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,807.50 : 808,215.30 = 239,207.40 : x
  2. Step 2: Convert to fraction form
    538,807.50/808,215.30 = 239,207.40/x
  3. Step 3: Cross multiply
    538,807.50x = 808,215.30 × 239,207.40
  4. Step 4: Simplify right side
    538,807.50x = 193,331,080,553.22
  5. Step 5: Solve for x
    x = 193,331,080,553.22/538,807.50
  6. Step 6: Final answer
    x = 358,812.90

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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.