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Finding the Fourth Proportional to 660.16, 989.16 and 476.70

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Solution

The fourth proportional to 660.16, 989.16 and 476.70 is: 714.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.16 : 989.16 = 476.70 : x
  2. Step 2: Convert to fraction form
    660.16/989.16 = 476.70/x
  3. Step 3: Cross multiply
    660.16x = 989.16 × 476.70
  4. Step 4: Simplify right side
    660.16x = 471,532.57
  5. Step 5: Solve for x
    x = 471,532.57/660.16
  6. Step 6: Final answer
    x = 714.27

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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.