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Finding the Fourth Proportional to 553.38, 764.31 and 429.45

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Solution

The fourth proportional to 553.38, 764.31 and 429.45 is: 593.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.38 : 764.31 = 429.45 : x
  2. Step 2: Convert to fraction form
    553.38/764.31 = 429.45/x
  3. Step 3: Cross multiply
    553.38x = 764.31 × 429.45
  4. Step 4: Simplify right side
    553.38x = 328,232.93
  5. Step 5: Solve for x
    x = 328,232.93/553.38
  6. Step 6: Final answer
    x = 593.14

Related Problems

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Half scale
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Double scale
Find fourth proportional to 554.38, 765.69 and 430.45
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.