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Finding the Fourth Proportional to 873.83, 1,310.73 and 289.10

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Solution

The fourth proportional to 873.83, 1,310.73 and 289.10 is: 433.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.83 : 1,310.73 = 289.10 : x
  2. Step 2: Convert to fraction form
    873.83/1,310.73 = 289.10/x
  3. Step 3: Cross multiply
    873.83x = 1,310.73 × 289.10
  4. Step 4: Simplify right side
    873.83x = 378,932.04
  5. Step 5: Solve for x
    x = 378,932.04/873.83
  6. Step 6: Final answer
    x = 433.65

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Double scale
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Similar ratio
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1.5x scale

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.