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Finding the Fourth Proportional to 554.69, 764.56 and 407.27

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Solution

The fourth proportional to 554.69, 764.56 and 407.27 is: 561.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.69 : 764.56 = 407.27 : x
  2. Step 2: Convert to fraction form
    554.69/764.56 = 407.27/x
  3. Step 3: Cross multiply
    554.69x = 764.56 × 407.27
  4. Step 4: Simplify right side
    554.69x = 311,382.35
  5. Step 5: Solve for x
    x = 311,382.35/554.69
  6. Step 6: Final answer
    x = 561.36

Related Problems

Find fourth proportional to 277.35, 382.28 and 203.64
Half scale
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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.