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Finding the Fourth Proportional to 669.63, 1,008.30 and 488.28

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Solution

The fourth proportional to 669.63, 1,008.30 and 488.28 is: 735.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.63 : 1,008.30 = 488.28 : x
  2. Step 2: Convert to fraction form
    669.63/1,008.30 = 488.28/x
  3. Step 3: Cross multiply
    669.63x = 1,008.30 × 488.28
  4. Step 4: Simplify right side
    669.63x = 492,332.72
  5. Step 5: Solve for x
    x = 492,332.72/669.63
  6. Step 6: Final answer
    x = 735.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.