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Finding the Fourth Proportional to 615.90, 848.97 and 484.74

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Solution

The fourth proportional to 615.90, 848.97 and 484.74 is: 668.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.90 : 848.97 = 484.74 : x
  2. Step 2: Convert to fraction form
    615.90/848.97 = 484.74/x
  3. Step 3: Cross multiply
    615.90x = 848.97 × 484.74
  4. Step 4: Simplify right side
    615.90x = 411,529.72
  5. Step 5: Solve for x
    x = 411,529.72/615.90
  6. Step 6: Final answer
    x = 668.18

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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.