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Finding the Fourth Proportional to 615.03, 848.34 and 393.63

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Solution

The fourth proportional to 615.03, 848.34 and 393.63 is: 542.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.03 : 848.34 = 393.63 : x
  2. Step 2: Convert to fraction form
    615.03/848.34 = 393.63/x
  3. Step 3: Cross multiply
    615.03x = 848.34 × 393.63
  4. Step 4: Simplify right side
    615.03x = 333,932.07
  5. Step 5: Solve for x
    x = 333,932.07/615.03
  6. Step 6: Final answer
    x = 542.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.