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Finding the Fourth Proportional to 393,903.76, 590,731.71 and 127,602.49

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Solution

The fourth proportional to 393,903.76, 590,731.71 and 127,602.49 is: 191,363.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,903.76 : 590,731.71 = 127,602.49 : x
  2. Step 2: Convert to fraction form
    393,903.76/590,731.71 = 127,602.49/x
  3. Step 3: Cross multiply
    393,903.76x = 590,731.71 × 127,602.49
  4. Step 4: Simplify right side
    393,903.76x = 75,378,836,479.95
  5. Step 5: Solve for x
    x = 75,378,836,479.95/393,903.76
  6. Step 6: Final answer
    x = 191,363.59

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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.