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Finding the Fourth Proportional to 538,812.50, 808,222.80 and 239,212.40

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Solution

The fourth proportional to 538,812.50, 808,222.80 and 239,212.40 is: 358,820.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,812.50 : 808,222.80 = 239,212.40 : x
  2. Step 2: Convert to fraction form
    538,812.50/808,222.80 = 239,212.40/x
  3. Step 3: Cross multiply
    538,812.50x = 808,222.80 × 239,212.40
  4. Step 4: Simplify right side
    538,812.50x = 193,336,915,722.72
  5. Step 5: Solve for x
    x = 193,336,915,722.72/538,812.50
  6. Step 6: Final answer
    x = 358,820.40

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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.