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Finding the Fourth Proportional to 558.93, 771.47 and 393.19

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Solution

The fourth proportional to 558.93, 771.47 and 393.19 is: 542.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.93 : 771.47 = 393.19 : x
  2. Step 2: Convert to fraction form
    558.93/771.47 = 393.19/x
  3. Step 3: Cross multiply
    558.93x = 771.47 × 393.19
  4. Step 4: Simplify right side
    558.93x = 303,334.29
  5. Step 5: Solve for x
    x = 303,334.29/558.93
  6. Step 6: Final answer
    x = 542.71

Related Problems

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Half scale
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Double scale
Find fourth proportional to 559.93, 772.85 and 394.19
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.