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Finding the Fourth Proportional to 685.02, 944.55 and 552.18

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Solution

The fourth proportional to 685.02, 944.55 and 552.18 is: 761.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    685.02 : 944.55 = 552.18 : x
  2. Step 2: Convert to fraction form
    685.02/944.55 = 552.18/x
  3. Step 3: Cross multiply
    685.02x = 944.55 × 552.18
  4. Step 4: Simplify right side
    685.02x = 521,561.62
  5. Step 5: Solve for x
    x = 521,561.62/685.02
  6. Step 6: Final answer
    x = 761.38

Related Problems

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Half scale
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Double scale
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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.