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Finding the Fourth Proportional to 558.75, 771.12 and 325.92

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Solution

The fourth proportional to 558.75, 771.12 and 325.92 is: 449.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.75 : 771.12 = 325.92 : x
  2. Step 2: Convert to fraction form
    558.75/771.12 = 325.92/x
  3. Step 3: Cross multiply
    558.75x = 771.12 × 325.92
  4. Step 4: Simplify right side
    558.75x = 251,323.43
  5. Step 5: Solve for x
    x = 251,323.43/558.75
  6. Step 6: Final answer
    x = 449.80

Related Problems

Find fourth proportional to 279.38, 385.56 and 162.96
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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.