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Finding the Fourth Proportional to 554.40, 764.90 and 357.56

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Solution

The fourth proportional to 554.40, 764.90 and 357.56 is: 493.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.40 : 764.90 = 357.56 : x
  2. Step 2: Convert to fraction form
    554.40/764.90 = 357.56/x
  3. Step 3: Cross multiply
    554.40x = 764.90 × 357.56
  4. Step 4: Simplify right side
    554.40x = 273,497.64
  5. Step 5: Solve for x
    x = 273,497.64/554.40
  6. Step 6: Final answer
    x = 493.32

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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.