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Finding the Fourth Proportional to 1,082.69, 1,624.30 and 313.19

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Solution

The fourth proportional to 1,082.69, 1,624.30 and 313.19 is: 469.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,082.69 : 1,624.30 = 313.19 : x
  2. Step 2: Convert to fraction form
    1,082.69/1,624.30 = 313.19/x
  3. Step 3: Cross multiply
    1,082.69x = 1,624.30 × 313.19
  4. Step 4: Simplify right side
    1,082.69x = 508,714.52
  5. Step 5: Solve for x
    x = 508,714.52/1,082.69
  6. Step 6: Final answer
    x = 469.86

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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.