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Finding the Fourth Proportional to 615.02, 848.48 and 393.89

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Solution

The fourth proportional to 615.02, 848.48 and 393.89 is: 543.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.02 : 848.48 = 393.89 : x
  2. Step 2: Convert to fraction form
    615.02/848.48 = 393.89/x
  3. Step 3: Cross multiply
    615.02x = 848.48 × 393.89
  4. Step 4: Simplify right side
    615.02x = 334,201.58
  5. Step 5: Solve for x
    x = 334,201.58/615.02
  6. Step 6: Final answer
    x = 543.40

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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.