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Finding the Fourth Proportional to 615.17, 848.40 and 449.32

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Solution

The fourth proportional to 615.17, 848.40 and 449.32 is: 619.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.17 : 848.40 = 449.32 : x
  2. Step 2: Convert to fraction form
    615.17/848.40 = 449.32/x
  3. Step 3: Cross multiply
    615.17x = 848.40 × 449.32
  4. Step 4: Simplify right side
    615.17x = 381,203.09
  5. Step 5: Solve for x
    x = 381,203.09/615.17
  6. Step 6: Final answer
    x = 619.67

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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.