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Finding the Fourth Proportional to 656.37, 979.02 and 615.33

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Solution

The fourth proportional to 656.37, 979.02 and 615.33 is: 917.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.37 : 979.02 = 615.33 : x
  2. Step 2: Convert to fraction form
    656.37/979.02 = 615.33/x
  3. Step 3: Cross multiply
    656.37x = 979.02 × 615.33
  4. Step 4: Simplify right side
    656.37x = 602,420.38
  5. Step 5: Solve for x
    x = 602,420.38/656.37
  6. Step 6: Final answer
    x = 917.81

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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.