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Finding the Fourth Proportional to 976.35, 1,347.12 and 933.83

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Solution

The fourth proportional to 976.35, 1,347.12 and 933.83 is: 1,288.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.35 : 1,347.12 = 933.83 : x
  2. Step 2: Convert to fraction form
    976.35/1,347.12 = 933.83/x
  3. Step 3: Cross multiply
    976.35x = 1,347.12 × 933.83
  4. Step 4: Simplify right side
    976.35x = 1,257,981.07
  5. Step 5: Solve for x
    x = 1,257,981.07/976.35
  6. Step 6: Final answer
    x = 1,288.45

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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.