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Finding the Fourth Proportional to 556.92, 768.18 and 440.28

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Solution

The fourth proportional to 556.92, 768.18 and 440.28 is: 607.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.92 : 768.18 = 440.28 : x
  2. Step 2: Convert to fraction form
    556.92/768.18 = 440.28/x
  3. Step 3: Cross multiply
    556.92x = 768.18 × 440.28
  4. Step 4: Simplify right side
    556.92x = 338,214.29
  5. Step 5: Solve for x
    x = 338,214.29/556.92
  6. Step 6: Final answer
    x = 607.29

Related Problems

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Half scale
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Double scale
Find fourth proportional to 557.92, 769.56 and 441.28
Similar ratio
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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.