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Finding the Fourth Proportional to 553.34, 763.57 and 304.65

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Solution

The fourth proportional to 553.34, 763.57 and 304.65 is: 420.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.34 : 763.57 = 304.65 : x
  2. Step 2: Convert to fraction form
    553.34/763.57 = 304.65/x
  3. Step 3: Cross multiply
    553.34x = 763.57 × 304.65
  4. Step 4: Simplify right side
    553.34x = 232,621.98
  5. Step 5: Solve for x
    x = 232,621.98/553.34
  6. Step 6: Final answer
    x = 420.40

Related Problems

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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.