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Finding the Fourth Proportional to 859.02, 1,288.53 and 311.08

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Solution

The fourth proportional to 859.02, 1,288.53 and 311.08 is: 466.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    859.02 : 1,288.53 = 311.08 : x
  2. Step 2: Convert to fraction form
    859.02/1,288.53 = 311.08/x
  3. Step 3: Cross multiply
    859.02x = 1,288.53 × 311.08
  4. Step 4: Simplify right side
    859.02x = 400,827.91
  5. Step 5: Solve for x
    x = 400,827.91/859.02
  6. Step 6: Final answer
    x = 466.61

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Double scale
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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.