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Finding the Fourth Proportional to 1,605.92, 2,409.18 and 631.48

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Solution

The fourth proportional to 1,605.92, 2,409.18 and 631.48 is: 947.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,605.92 : 2,409.18 = 631.48 : x
  2. Step 2: Convert to fraction form
    1,605.92/2,409.18 = 631.48/x
  3. Step 3: Cross multiply
    1,605.92x = 2,409.18 × 631.48
  4. Step 4: Simplify right side
    1,605.92x = 1,521,348.99
  5. Step 5: Solve for x
    x = 1,521,348.99/1,605.92
  6. Step 6: Final answer
    x = 947.34

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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.