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Finding the Fourth Proportional to 615.06, 848.79 and 345.90

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Solution

The fourth proportional to 615.06, 848.79 and 345.90 is: 477.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.06 : 848.79 = 345.90 : x
  2. Step 2: Convert to fraction form
    615.06/848.79 = 345.90/x
  3. Step 3: Cross multiply
    615.06x = 848.79 × 345.90
  4. Step 4: Simplify right side
    615.06x = 293,596.46
  5. Step 5: Solve for x
    x = 293,596.46/615.06
  6. Step 6: Final answer
    x = 477.35

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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.