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Finding the Fourth Proportional to 714.03, 985.83 and 478.28

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Solution

The fourth proportional to 714.03, 985.83 and 478.28 is: 660.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.03 : 985.83 = 478.28 : x
  2. Step 2: Convert to fraction form
    714.03/985.83 = 478.28/x
  3. Step 3: Cross multiply
    714.03x = 985.83 × 478.28
  4. Step 4: Simplify right side
    714.03x = 471,505.24
  5. Step 5: Solve for x
    x = 471,505.24/714.03
  6. Step 6: Final answer
    x = 660.34

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.