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Finding the Fourth Proportional to 891.99, 1,337.85 and 646.37

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Solution

The fourth proportional to 891.99, 1,337.85 and 646.37 is: 969.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.99 : 1,337.85 = 646.37 : x
  2. Step 2: Convert to fraction form
    891.99/1,337.85 = 646.37/x
  3. Step 3: Cross multiply
    891.99x = 1,337.85 × 646.37
  4. Step 4: Simplify right side
    891.99x = 864,746.10
  5. Step 5: Solve for x
    x = 864,746.10/891.99
  6. Step 6: Final answer
    x = 969.46

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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.