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Finding the Fourth Proportional to 615.40, 848.74 and 475.56

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Solution

The fourth proportional to 615.40, 848.74 and 475.56 is: 655.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.40 : 848.74 = 475.56 : x
  2. Step 2: Convert to fraction form
    615.40/848.74 = 475.56/x
  3. Step 3: Cross multiply
    615.40x = 848.74 × 475.56
  4. Step 4: Simplify right side
    615.40x = 403,626.79
  5. Step 5: Solve for x
    x = 403,626.79/615.40
  6. Step 6: Final answer
    x = 655.88

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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.