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Finding the Fourth Proportional to 1,082.40, 1,623.76 and 342.08

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Solution

The fourth proportional to 1,082.40, 1,623.76 and 342.08 is: 513.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,082.40 : 1,623.76 = 342.08 : x
  2. Step 2: Convert to fraction form
    1,082.40/1,623.76 = 342.08/x
  3. Step 3: Cross multiply
    1,082.40x = 1,623.76 × 342.08
  4. Step 4: Simplify right side
    1,082.40x = 555,455.82
  5. Step 5: Solve for x
    x = 555,455.82/1,082.40
  6. Step 6: Final answer
    x = 513.17

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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.