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Finding the Fourth Proportional to 977.33, 1,347.31 and 697.08

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Solution

The fourth proportional to 977.33, 1,347.31 and 697.08 is: 960.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.33 : 1,347.31 = 697.08 : x
  2. Step 2: Convert to fraction form
    977.33/1,347.31 = 697.08/x
  3. Step 3: Cross multiply
    977.33x = 1,347.31 × 697.08
  4. Step 4: Simplify right side
    977.33x = 939,181.11
  5. Step 5: Solve for x
    x = 939,181.11/977.33
  6. Step 6: Final answer
    x = 960.96

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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.