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Finding the Fourth Proportional to 553.32, 764.10 and 346.68

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Solution

The fourth proportional to 553.32, 764.10 and 346.68 is: 478.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.32 : 764.10 = 346.68 : x
  2. Step 2: Convert to fraction form
    553.32/764.10 = 346.68/x
  3. Step 3: Cross multiply
    553.32x = 764.10 × 346.68
  4. Step 4: Simplify right side
    553.32x = 264,898.19
  5. Step 5: Solve for x
    x = 264,898.19/553.32
  6. Step 6: Final answer
    x = 478.74

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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.