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Finding the Fourth Proportional to 933.91, 1,400.88 and 611.32

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Solution

The fourth proportional to 933.91, 1,400.88 and 611.32 is: 916.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.91 : 1,400.88 = 611.32 : x
  2. Step 2: Convert to fraction form
    933.91/1,400.88 = 611.32/x
  3. Step 3: Cross multiply
    933.91x = 1,400.88 × 611.32
  4. Step 4: Simplify right side
    933.91x = 856,385.96
  5. Step 5: Solve for x
    x = 856,385.96/933.91
  6. Step 6: Final answer
    x = 916.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.