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Finding the Fourth Proportional to 554.51, 764.38 and 456.09

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Solution

The fourth proportional to 554.51, 764.38 and 456.09 is: 628.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.51 : 764.38 = 456.09 : x
  2. Step 2: Convert to fraction form
    554.51/764.38 = 456.09/x
  3. Step 3: Cross multiply
    554.51x = 764.38 × 456.09
  4. Step 4: Simplify right side
    554.51x = 348,626.07
  5. Step 5: Solve for x
    x = 348,626.07/554.51
  6. Step 6: Final answer
    x = 628.72

Related Problems

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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.