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Finding the Fourth Proportional to 669.95, 1,004.93 and 440.29

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Solution

The fourth proportional to 669.95, 1,004.93 and 440.29 is: 660.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.95 : 1,004.93 = 440.29 : x
  2. Step 2: Convert to fraction form
    669.95/1,004.93 = 440.29/x
  3. Step 3: Cross multiply
    669.95x = 1,004.93 × 440.29
  4. Step 4: Simplify right side
    669.95x = 442,460.63
  5. Step 5: Solve for x
    x = 442,460.63/669.95
  6. Step 6: Final answer
    x = 660.44

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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.