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Finding the Fourth Proportional to 615.08, 917.72 and 553.58

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Solution

The fourth proportional to 615.08, 917.72 and 553.58 is: 825.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.08 : 917.72 = 553.58 : x
  2. Step 2: Convert to fraction form
    615.08/917.72 = 553.58/x
  3. Step 3: Cross multiply
    615.08x = 917.72 × 553.58
  4. Step 4: Simplify right side
    615.08x = 508,031.44
  5. Step 5: Solve for x
    x = 508,031.44/615.08
  6. Step 6: Final answer
    x = 825.96

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.