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Finding the Fourth Proportional to 615.56, 848.10 and 418.68

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Solution

The fourth proportional to 615.56, 848.10 and 418.68 is: 576.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.56 : 848.10 = 418.68 : x
  2. Step 2: Convert to fraction form
    615.56/848.10 = 418.68/x
  3. Step 3: Cross multiply
    615.56x = 848.10 × 418.68
  4. Step 4: Simplify right side
    615.56x = 355,082.51
  5. Step 5: Solve for x
    x = 355,082.51/615.56
  6. Step 6: Final answer
    x = 576.84

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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.