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Finding the Fourth Proportional to 563.61, 778.04 and 330.75

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Solution

The fourth proportional to 563.61, 778.04 and 330.75 is: 456.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.61 : 778.04 = 330.75 : x
  2. Step 2: Convert to fraction form
    563.61/778.04 = 330.75/x
  3. Step 3: Cross multiply
    563.61x = 778.04 × 330.75
  4. Step 4: Simplify right side
    563.61x = 257,335.08
  5. Step 5: Solve for x
    x = 257,335.08/563.61
  6. Step 6: Final answer
    x = 456.58

Related Problems

Find fourth proportional to 281.81, 389.02 and 165.38
Half scale
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Double scale
Find fourth proportional to 564.61, 779.42 and 331.75
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.