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Finding the Fourth Proportional to 933.34, 1,390.92 and 905.19

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Solution

The fourth proportional to 933.34, 1,390.92 and 905.19 is: 1,348.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.34 : 1,390.92 = 905.19 : x
  2. Step 2: Convert to fraction form
    933.34/1,390.92 = 905.19/x
  3. Step 3: Cross multiply
    933.34x = 1,390.92 × 905.19
  4. Step 4: Simplify right side
    933.34x = 1,259,050.27
  5. Step 5: Solve for x
    x = 1,259,050.27/933.34
  6. Step 6: Final answer
    x = 1,348.98

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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.