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Finding the Fourth Proportional to 945.71, 1,418.61 and 893.77

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Solution

The fourth proportional to 945.71, 1,418.61 and 893.77 is: 1,340.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.71 : 1,418.61 = 893.77 : x
  2. Step 2: Convert to fraction form
    945.71/1,418.61 = 893.77/x
  3. Step 3: Cross multiply
    945.71x = 1,418.61 × 893.77
  4. Step 4: Simplify right side
    945.71x = 1,267,910.86
  5. Step 5: Solve for x
    x = 1,267,910.86/945.71
  6. Step 6: Final answer
    x = 1,340.70

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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.